General Surgery
Final Professional MBBS — General Surgery. Explanation-first answers that teach the reasoning behind every fact, with classifications, comparison tables, drug doses, clinical pearls and key-point recaps from Bailey & Love and SRB's Manual.
THE CONCEPT — TWO CANCERS IN ONE ORGAN
Oesophageal carcinoma is really two different diseases that share an organ, and grasping this distinction organises the whole topic. The two histological types — squamous cell carcinoma and adenocarcinoma — differ in their site, their risk factors and their epidemiology. Both share a grim feature, however: because the oesophagus has no serosal covering and a rich submucosal lymphatic network, the tumour spreads early and presents late, so the prognosis is generally poor.
THE TWO TYPES
Squamous cell carcinoma Adenocarcinoma Site Upper and middle third Lower third / gastro-oesophageal junction Risk factors Smoking, alcohol, hot drinks, achalasia, Plummer-Vinson, corrosive stricture GORD → Barrett's oesophagus, obesity Epidemiology Commoner in the developing world Rising in the Western world The key link to remember is that adenocarcinoma arises from Barrett's oesophagus — the metaplastic change caused by chronic acid reflux — which is why long-standing GORD is a cancer risk.
CLINICAL FEATURES
The cardinal symptom is progressive dysphagia — difficulty swallowing that begins with solids and advances to liquids as the lumen narrows — accompanied by marked weight loss. Other features include odynophagia (painful swallowing), regurgitation, and anaemia from chronic bleeding. Late or advanced disease may cause hoarseness (recurrent laryngeal nerve involvement), a cough on swallowing (a tracheo-oesophageal fistula), and supraclavicular lymphadenopathy.
SPREAD
The routes of spread explain the late, incurable presentation. Direct spread invades the mediastinum, trachea and aorta (unchecked by any serosa). Lymphatic spread is early and extensive through the submucosal plexus, producing 'skip lesions' away from the main tumour. Blood-borne spread reaches the liver and lungs, and transcoelomic spread can occur for lower tumours.
INVESTIGATION & STAGING
Upper GI endoscopy with biopsy is the diagnostic test, directly visualising the tumour and providing tissue. Staging then determines whether cure is possible: CT of the chest and abdomen (distant spread), endoscopic ultrasound (EUS) (the depth of invasion, T stage, and local nodes, N stage), PET-CT (occult metastases), and staging laparoscopy for lower/junctional tumours (peritoneal disease).
MANAGEMENT
- Curative treatment — possible only in early, localised disease: oesophagectomy (e.g. the Ivor-Lewis or transhiatal approach), usually preceded by neoadjuvant chemotherapy or chemoradiotherapy to improve outcomes.
- Palliative treatment — for the majority who present late, the goal is to relieve dysphagia and maintain quality of life with a self-expanding metal stent, radiotherapy or chemotherapy, laser recanalisation, and nutritional and supportive care.
💡CLINICAL PEARL: The single most important rule: progressive dysphagia (solids then liquids) with weight loss in an older patient is oesophageal cancer until proven otherwise and demands urgent endoscopy — never attribute new dysphagia to 'indigestion'. And remember the causal chain GORD → Barrett's → adenocarcinoma, which is why reflux is taken seriously.NUTRITION & THE MULTIDISCIPLINARY APPROACH
Because dysphagia and cachexia dominate the illness, nutritional support is central — many patients need feeding via a fine-bore nasogastric tube, a feeding jejunostomy, or a stent to restore swallowing before and during treatment. Care is delivered by a multidisciplinary team (upper-GI surgeon, oncologist, radiologist, pathologist, dietitian and specialist nurse) that decides between curative and palliative pathways based on stage and fitness. Given that most patients present with incurable disease, honest discussion of prognosis and early involvement of palliative care are as important as the technical options.
ALARM FEATURES & EARLY DETECTION
The lesson from the poor prognosis is the value of acting on 'alarm' symptoms: any patient over ~55 with new dysphagia, weight loss, persistent vomiting, gastrointestinal bleeding or iron-deficiency anaemia needs urgent endoscopy. In patients with long-standing reflux, recognising and surveilling Barrett's oesophagus offers the chance to detect adenocarcinoma at a curable, early stage — the main opportunity to improve on the generally dismal outcomes of established disease.
A NOTE ON PALLIATION
Since most patients are incurable, effective palliation is a large part of oesophageal cancer care. The dominant problem is dysphagia, best relieved by a self-expanding metal stent placed endoscopically, which restores swallowing quickly; radiotherapy (external beam or brachytherapy) and chemotherapy shrink the tumour and prolong relief, and laser or argon-plasma coagulation can recanalise an obstructing tumour. Managing pain, nutrition, and a distressing tracheo-oesophageal fistula (with a covered stent) are central goals, delivered with early palliative-care involvement.
💊KEY POINTS / NUMBERS (viva)- Diagnostic test = upper GI endoscopy + biopsy; stage with CT, EUS, PET-CT ± staging laparoscopy.
- Curative option = oesophagectomy (± neoadjuvant chemo/chemoradiotherapy) in localised disease only.
- Adenocarcinoma arises from Barrett's oesophagus (chronic GORD).
🔑KEY POINTS TO REMEMBER- Two types: squamous (upper/mid third; smoking, alcohol, achalasia) and adenocarcinoma (lower third/GOJ; from Barrett's/GORD, obesity).
- No serosa + rich submucosal lymphatics → early spread, late presentation, poor prognosis.
- Progressive dysphagia (solids→liquids) + weight loss ± hoarseness/cough (fistula)/anaemia.
- Diagnose by endoscopy + biopsy; stage with CT, EUS (T/N), PET-CT, staging laparoscopy.
- Curative: oesophagectomy ± neoadjuvant therapy (early disease only); most get palliation (stent, chemo/radiotherapy).
📚SOURCES: Bailey & Love's Short Practice of Surgery; SRB's Manual of Surgery.THE CONCEPT — A FAILED VALVE
Gastro-oesophageal reflux disease (GORD) is the reflux of acidic gastric contents into the oesophagus in sufficient amount to cause symptoms or mucosal damage. It arises when the normal anti-reflux mechanism fails. That mechanism is not a single sphincter but a combination: the tone of the lower oesophageal sphincter (LOS), the acute angle of His where the oesophagus meets the stomach (a flap valve), the pinch of the diaphragmatic crura, and a short intra-abdominal segment of oesophagus. When these are disrupted — often by a hiatus hernia — reflux occurs.
RISK FACTORS
Anything that lowers LOS tone or raises intra-abdominal pressure promotes reflux: obesity, hiatus hernia, pregnancy, smoking, alcohol, fatty or large meals, and drugs that relax the LOS. Understanding these explains why lifestyle change is central to treatment.
CLINICAL FEATURES
The classic symptom is heartburn — a retrosternal burning that is worse on lying down, bending or after meals — with acid regurgitation and waterbrash (excess salivation). Atypical presentations are important: chronic cough, hoarseness, nocturnal asthma and dental erosion can all be due to reflux. New dysphagia suggests a complication (stricture) and warrants endoscopy.
COMPLICATIONS
Chronic reflux damages the oesophagus in a recognisable sequence: oesophagitis → peptic stricture (causing dysphagia) → Barrett's oesophagus (columnar metaplasia, a premalignant change carrying a risk of adenocarcinoma), and bleeding with iron-deficiency anaemia. It is the risk of Barrett's and cancer that makes persistent reflux more than a nuisance.
HIATUS HERNIA — THE TYPES
A hiatus hernia is herniation of part of the stomach through the oesophageal hiatus of the diaphragm into the chest, and its two types behave very differently:
Type Anatomy Behaviour Sliding (~90%) The gastro-oesophageal junction slides up into the chest Associated with reflux Rolling / para-oesophageal (~5%) The fundus rolls up beside the oesophagus; the junction stays below Little reflux but risk of strangulation/volvulus INVESTIGATION & MANAGEMENT
Investigation includes upper GI endoscopy (to grade oesophagitis, detect Barrett's and exclude cancer), 24-hour pH monitoring (the gold standard for confirming reflux), oesophageal manometry, and a barium swallow for the hernia. Management is stepwise:
- Lifestyle — weight loss, elevating the head of the bed, avoiding trigger foods and late meals, stopping smoking.
- Medical — proton pump inhibitors (PPIs) are the mainstay, with antacids and H2-blockers as adjuncts.
- Surgical — for refractory symptoms, volume reflux or complications: a Nissen fundoplication (wrapping the gastric fundus around the lower oesophagus to recreate a valve), with repair of the hiatus.
💡CLINICAL PEARL: The key contrast: a sliding hiatus hernia causes reflux and is managed medically with PPIs, whereas a rolling (para-oesophageal) hernia causes little reflux but is prone to strangulation and gastric volvulus, so it is generally repaired surgically even when asymptomatic.WHY THE ANTI-REFLUX MECHANISM FAILS
It is worth expanding on the physiology, because it explains both symptoms and surgery. Normally, transient reflux is prevented by the resting tone of the LOS and reinforced by the flap-valve effect of the acute angle of His and the 'pinchcock' action of the diaphragmatic crura during rises in intra-abdominal pressure. A sliding hiatus hernia pulls the junction into the chest, flattening the angle of His and separating the sphincter from the crural support — so the several layers of protection fail together, which is why hernia and reflux so often coexist and why surgery aims to restore this anatomy.
SURGERY & ITS COMPLICATIONS
Nissen fundoplication (a 360° wrap of fundus around the lower oesophagus) recreates a competent valve and is highly effective, but the patient must be counselled about its characteristic side-effects: dysphagia (if the wrap is too tight), 'gas-bloat' syndrome and inability to belch or vomit, and flatulence. Careful patient selection — ideally those with proven acid reflux on pH testing who responded to PPIs — gives the best results, and a partial (e.g. Toupet) wrap may be chosen where oesophageal motility is poor.
A NOTE ON ATYPICAL & EXTRA-OESOPHAGEAL REFLUX
Reflux does not always present as heartburn. 'Silent' or extra-oesophageal reflux can present to other specialties — as chronic cough, recurrent laryngitis and hoarseness, throat clearing, or worsening asthma — because refluxed acid irritates the larynx and airway. Recognising this prevents prolonged mistreatment of a 'respiratory' or 'ENT' complaint that is actually GORD, and a trial of PPI or pH testing confirms the link.
💊KEY POINTS / NUMBERS (viva)- PPIs are the mainstay of GORD; 24-hour pH monitoring is the gold-standard diagnostic test.
- Surgery = Nissen fundoplication for refractory reflux/complications.
- Rolling (para-oesophageal) hernia → surgical repair (strangulation risk).
🔑KEY POINTS TO REMEMBER- GORD = reflux causing symptoms/damage from failure of the anti-reflux mechanism (LOS tone, angle of His, crura, intra-abdominal oesophagus).
- Heartburn worse lying/bending/after meals + regurgitation; atypical: cough, hoarseness, asthma; new dysphagia = complication.
- Complications: oesophagitis → stricture → Barrett's (→ adenocarcinoma) → bleeding.
- Hiatus hernia: sliding (90%, reflux) vs rolling/para-oesophageal (strangulation/volvulus risk).
- Lifestyle + PPIs (mainstay); Nissen fundoplication for refractory disease; repair a rolling hernia surgically.
📚SOURCES: Bailey & Love's Short Practice of Surgery; SRB's Manual of Surgery.THE CONCEPT — A BALANCE TIPPED
A peptic ulcer is a breach in the mucosa of the stomach or duodenum that penetrates the muscularis mucosae, occurring wherever mucosa is exposed to acid and pepsin. The unifying idea is an imbalance between aggressive and defensive factors: aggression from acid, pepsin, Helicobacter pylori and NSAIDs, versus defence from mucus, bicarbonate, mucosal blood flow and prostaglandins. Anything that increases aggression or weakens defence produces an ulcer, and this framework explains both the causes and the treatment.
AETIOLOGY
- Helicobacter pylori — the dominant cause: a Gram-negative spiral bacterium found in the great majority of duodenal (~95%) and gastric (~70%) ulcers. It damages the mucosa directly and disturbs acid regulation.
- NSAIDs — inhibit cyclo-oxygenase and hence prostaglandins, removing a key mucosal defence.
- Others — smoking, severe physiological stress (Cushing's ulcer after head injury, Curling's ulcer after burns), steroids, and the rare gastrin-secreting tumour of Zollinger-Ellison syndrome.
DUODENAL VS GASTRIC ULCER
Duodenal ulcer Gastric ulcer Age Younger Older Pain & food Relieved by food (hunger/night pain) Worse with food; weight loss H. pylori Almost always Common Malignancy Essentially never Must biopsy to exclude cancer CLINICAL FEATURES
The typical symptom is epigastric pain — burning or gnawing — with a characteristic relationship to food (relieved by eating in duodenal ulcers, worsened in gastric ulcers), along with nausea and dyspepsia. Sometimes a complication (bleeding or perforation) is the first presentation, which is why dyspepsia with alarm features is investigated.
INVESTIGATION
Upper GI endoscopy is the key investigation — it visualises the ulcer, and importantly every gastric ulcer is biopsied to exclude malignancy and tested for H. pylori (rapid urease/CLO test, histology). Non-invasive H. pylori tests include the urea breath test and stool antigen. A fasting serum gastrin is measured if Zollinger-Ellison syndrome is suspected.
MANAGEMENT
- Eradicate H. pylori — triple therapy: a PPI plus two antibiotics (e.g. amoxicillin and clarithromycin) for 1–2 weeks — which cures most ulcers and prevents recurrence.
- Acid suppression — a PPI to heal the ulcer.
- Remove precipitants — stop NSAIDs and smoking; use gastroprotection if NSAIDs are essential.
- Surgery — now rare, reserved for complications or truly refractory disease (historically vagotomy and antrectomy).
💡CLINICAL PEARL: Two rules dominate. H. pylori is the main cause and eradication (triple therapy) is central — curing the infection cures the ulcer. And every gastric ulcer must be biopsied to exclude malignancy (a duodenal ulcer need not be, as it is essentially never malignant). The pain pattern helps too: relieved by food = duodenal, worsened by food = gastric.HOW H. PYLORI CAUSES ULCERS
Understanding the organism's mechanism ties the topic together. H. pylori survives in the hostile acid of the stomach by producing urease, which splits urea to release ammonia and neutralise the acid around it. It colonises the gastric antrum, causing inflammation that increases gastrin and thus acid output; the excess acid damages the duodenum, where gastric metaplasia then allows the organism to colonise and ulcerate — explaining duodenal ulcers. In the body of the stomach it can instead cause atrophic gastritis, predisposing to gastric ulcers and cancer. This dual behaviour explains why the same organism causes different diseases.
ALARM FEATURES & FOLLOW-UP
Dyspepsia is extremely common and mostly benign, so 'alarm features' select who needs urgent endoscopy: age over ~55 with new symptoms, weight loss, dysphagia, persistent vomiting, gastrointestinal bleeding (haematemesis/melaena) or iron-deficiency anaemia. After treatment, gastric ulcers are re-scoped to confirm healing and exclude an underlying cancer, and H. pylori eradication is confirmed (e.g. by urea breath test) — steps not needed for a straightforward healed duodenal ulcer.
SURGERY & ITS HISTORICAL CONTEXT
Although drugs have made ulcer surgery rare, the classic operations are worth knowing for context: truncal or highly selective vagotomy (reducing acid by cutting the vagal supply, historically with a drainage procedure), and partial gastrectomy (Billroth I/II). These are now reserved almost entirely for complications — a perforation, uncontrolled bleeding, or obstruction not relieved endoscopically — reflecting the shift from elective acid-reducing surgery to emergency, complication-driven surgery in the H. pylori era.
💊KEY POINTS / NUMBERS (viva)- Triple therapy = PPI + amoxicillin + clarithromycin for 1–2 weeks (H. pylori eradication).
- Every GASTRIC ulcer is biopsied to exclude malignancy; confirm healing/eradication.
- Duodenal pain relieved by food; gastric pain worsened by food.
🔑KEY POINTS TO REMEMBER- Peptic ulcer = mucosal breach from imbalance of aggressive (acid, pepsin, H. pylori, NSAIDs) vs defensive (mucus, bicarbonate, blood flow, prostaglandins) factors.
- Main causes: H. pylori (most DU/GU) and NSAIDs; also stress (Cushing's/Curling's), Zollinger-Ellison.
- Duodenal (younger, pain relieved by food, not malignant) vs gastric (older, pain worse with food, biopsy for cancer).
- Endoscopy is key — biopsy every gastric ulcer + test for H. pylori (urease/breath/stool).
- Treat by H. pylori eradication (triple therapy) + PPI, stop NSAIDs/smoking; surgery only for complications.
📚SOURCES: Bailey & Love's Short Practice of Surgery; SRB's Manual of Surgery.THE CONCEPT
Peptic ulcers matter chiefly because of their complications, which may be the first presentation of a previously silent ulcer. There are four to know, and a simple way to remember them is that an ulcer can bleed, perforate, obstruct, or (if gastric) turn malignant. Each has a characteristic mechanism that explains its clinical picture.
1. HAEMORRHAGE
Bleeding is the commonest complication. It is classically caused by a posterior duodenal ulcer eroding the gastroduodenal artery that lies behind it, producing brisk bleeding. The patient presents with haematemesis and/or melaena and may be shocked. Management is to resuscitate first (ABC, IV access, fluids/blood), then perform urgent endoscopy — which is both diagnostic and therapeutic (injection, clips or thermal coagulation) — with a PPI; surgery or angiographic embolisation is reserved for uncontrolled bleeding.
2. PERFORATION
Perforation is a dramatic surgical emergency, classically from an anterior duodenal ulcer that erodes through the wall, releasing gastroduodenal contents into the peritoneum. There is sudden, severe epigastric pain that rapidly becomes generalised (peritonitis), with a rigid, 'board-like' abdomen, absent bowel sounds and shock. An erect chest X-ray shows free gas under the diaphragm (pneumoperitoneum) in most cases. Treatment is resuscitation followed by surgery — closure with an omental (Graham) patch and peritoneal lavage — plus later H. pylori eradication.
3. GASTRIC OUTLET OBSTRUCTION
Chronic ulceration near the pylorus heals by fibrosis and scarring, which narrows the gastric outlet (cicatrising 'pyloric stenosis'). The stomach cannot empty, so there is projectile vomiting of large volumes of undigested, non-bile-stained food, a visible gastric peristalsis and a succussion splash, weight loss and dehydration. Persistent vomiting of gastric acid produces the classic hypochloraemic, hypokalaemic metabolic alkalosis. Treatment is to correct the fluid and electrolyte derangement, decompress the stomach with a nasogastric tube, and then relieve the obstruction (endoscopic balloon dilatation or surgery).
4. MALIGNANT CHANGE
A chronic gastric ulcer may harbour or develop into malignancy, which is why gastric ulcers are always biopsied and followed to healing. Duodenal ulcers do not become malignant.
💡CLINICAL PEARL: Three classic exam signs: perforation → gas under the diaphragm and a board-like abdomen → emergency surgery; a bleeding posterior duodenal ulcer erodes the gastroduodenal artery; and gastric outlet obstruction causes a hypochloraemic, hypokalaemic metabolic alkalosis from vomiting acid — correcting this comes before any definitive procedure.ASSESSING THE BLEEDING PATIENT
Because upper GI haemorrhage is common and potentially fatal, its assessment is standardised. Resuscitation comes first (two large-bore cannulae, fluids and blood, correcting coagulopathy). Risk is scored — the Glasgow-Blatchford score before endoscopy (identifying who can be managed as an outpatient) and the Rockall score after, to predict rebleeding and mortality. Endoscopy within 24 hours is both diagnostic and therapeutic, and the appearance of the ulcer (the Forrest classification — active spurting, oozing, a visible vessel or a clean base) predicts rebleeding and guides whether endoscopic therapy is needed.
PRINCIPLES COMMON TO THE COMPLICATIONS
Across all four complications the same principles apply: resuscitate before you investigate or operate, correct fluid and electrolyte derangement, and treat the underlying ulcer disease after the emergency is controlled (PPI, H. pylori eradication, stopping NSAIDs). Modern management has become far less operative — most bleeding is controlled endoscopically and most obstruction is dilated or stented — but the surgeon must still recognise the patient who needs the operating theatre without delay, particularly in perforation and uncontrolled haemorrhage.
RECOGNISING WHO NEEDS THEATRE
The judgement that defines good surgical care here is recognising the patient who cannot be managed conservatively: a perforation with peritonitis, haemorrhage not controlled at endoscopy (or that rebleeds), and obstruction refractory to dilatation all require operation. Delay in these situations — persisting with medical measures while the patient deteriorates — is the classic error, so a low threshold for senior surgical review and intervention is essential in the complicated ulcer.
💊KEY POINTS / NUMBERS (viva)- Perforation: erect CXR shows free sub-diaphragmatic gas (~70%); treat by resuscitation + omental (Graham) patch.
- Bleeding: resuscitate → endoscopic haemostasis + PPI; posterior DU erodes the gastroduodenal artery.
- Gastric outlet obstruction → hypochloraemic hypokalaemic metabolic alkalosis; correct fluids/electrolytes first.
🔑KEY POINTS TO REMEMBER- Four complications: haemorrhage, perforation, gastric outlet obstruction, and (gastric) malignant change.
- Haemorrhage (commonest): posterior DU erodes gastroduodenal artery → haematemesis/melaena; resuscitate → endoscopic haemostasis + PPI.
- Perforation: anterior DU → sudden pain, board-like rigidity, gas under diaphragm → resuscitation + omental (Graham) patch.
- Gastric outlet obstruction: pyloric scarring → projectile non-bilious vomiting, succussion splash, hypochloraemic hypokalaemic metabolic alkalosis → correct electrolytes then relieve.
- Gastric ulcers may be malignant (biopsy); duodenal ulcers are not.
📚SOURCES: Bailey & Love's Short Practice of Surgery; SRB's Manual of Surgery.THE CONCEPT
Gastric carcinoma is an adenocarcinoma in over 90% of cases, and its importance lies in its vague, late presentation — early symptoms mimic simple dyspepsia, so most cancers are advanced at diagnosis and the prognosis is poor. Its incidence is falling globally (partly through H. pylori treatment and better diet), but it remains a major cancer, and understanding its risk factors reveals a clear precancerous pathway.
RISK FACTORS & THE PRECANCEROUS SEQUENCE
The central risk factor is chronic Helicobacter pylori infection, which drives a well-recognised sequence: chronic gastritis → gastric atrophy → intestinal metaplasia → dysplasia → carcinoma. Other risks include a diet high in salt, smoked and nitrate-rich foods, smoking, pernicious anaemia and atrophic gastritis, previous gastric surgery, blood group A, and a family history.
PATHOLOGY
Two histological patterns are described: the intestinal type (well-differentiated, gland-forming, arising in the precancerous sequence above) and the diffuse type (poorly differentiated signet-ring cells that infiltrate widely). The diffuse type can transform the whole stomach into a rigid, contracted 'leather-bottle' stomach — linitis plastica. The macroscopic Borrmann classification describes polypoid, ulcerating and infiltrating forms.
CLINICAL FEATURES
Early disease is often silent or mimics dyspepsia. As it advances there is epigastric pain, weight loss, anorexia, early satiety, vomiting and anaemia (from occult bleeding); a tumour at the cardia causes dysphagia, and one at the pylorus causes gastric outlet obstruction. A palpable epigastric mass is a late sign. Signs of metastatic spread are highly examinable — Virchow's node (Troisier's sign) in the left supraclavicular fossa, a Sister Mary Joseph nodule at the umbilicus, a Krukenberg tumour of the ovary, hepatomegaly and ascites.
SPREAD
It spreads directly into adjacent organs, by lymphatics (to regional and distant nodes, including Virchow's node), by blood to the liver, and transcoelomically across the peritoneum (giving the Krukenberg tumour and Sister Mary Joseph nodule and malignant ascites).
INVESTIGATION & MANAGEMENT
Upper GI endoscopy with biopsy is diagnostic. Staging uses CT, endoscopic ultrasound (T/N stage), and staging laparoscopy (which detects the peritoneal metastases that CT misses). Management is:
- Curative (localised disease) — gastrectomy (partial or total) with a D2 lymphadenectomy, usually with perioperative chemotherapy.
- Palliative (advanced disease, the majority) — chemotherapy, stenting or bypass for obstruction, and supportive care.
💡CLINICAL PEARL: The metastatic eponyms are classic viva material: Virchow's node / Troisier's sign (left supraclavicular), the Sister Mary Joseph nodule (umbilical metastasis), and the Krukenberg tumour (transcoelomic ovarian metastasis). And linitis plastica — the diffuse signet-ring 'leather-bottle' stomach — is the pattern to name for diffuse-type gastric cancer.STAGING, PROGNOSIS & THE ROLE OF LAPAROSCOPY
Gastric cancer is staged by the TNM system, and prognosis depends heavily on the depth of invasion and, above all, on lymph-node involvement and the presence of peritoneal disease. A key practical point is the value of staging laparoscopy: CT frequently misses small-volume peritoneal metastases, which render the disease incurable, so a laparoscopy (with peritoneal washings for cytology) is performed before committing a patient to major resection — sparing those with occult peritoneal spread an unnecessary gastrectomy.
PRECANCEROUS CONDITIONS & PREVENTION
Because gastric cancer arises through a defined precancerous sequence, some prevention is possible. Eradicating H. pylori reduces risk, and known precancerous conditions — chronic atrophic gastritis, pernicious anaemia, intestinal metaplasia, gastric adenomatous polyps and the remnant after previous gastric surgery — may warrant surveillance. Dietary improvement (less salt and preserved food, more fresh fruit and vegetables) and not smoking contribute to the falling incidence seen in many countries.
PROGNOSIS & THE CASE FOR SCREENING
Prognosis is stage-dependent and, because most present late, generally poor; the marked survival difference between early and advanced disease is the argument for early detection. In high-incidence countries (e.g. Japan and Korea), population endoscopic screening detects many early, curable cancers and improves survival, an approach not cost-effective where incidence is low. Elsewhere, the practical message is to investigate dyspepsia with alarm features promptly and to surveil recognised precancerous conditions.
💊KEY POINTS / NUMBERS (viva)- Diagnosis = endoscopy + biopsy; stage with CT, EUS and staging laparoscopy (peritoneal disease).
- Curative surgery = gastrectomy + D2 lymphadenectomy ± perioperative chemotherapy.
- Signs of spread: Virchow's node (Troisier's), Sister Mary Joseph nodule, Krukenberg tumour.
🔑KEY POINTS TO REMEMBER- Gastric carcinoma = adenocarcinoma (>90%); vague late presentation, poor prognosis.
- Main risk = chronic H. pylori (gastritis → atrophy → intestinal metaplasia → dysplasia → carcinoma); also diet (salt/nitrates), pernicious anaemia, smoking.
- Types: intestinal (well-differentiated) vs diffuse (signet-ring → linitis plastica 'leather-bottle' stomach).
- Features: dyspepsia, weight loss, anaemia, early satiety; spread signs — Virchow's node (Troisier's), Sister Mary Joseph nodule, Krukenberg tumour.
- Endoscopy + biopsy diagnose; stage with CT/EUS/staging laparoscopy; gastrectomy + D2 nodes ± chemo (curative) or palliation.
📚SOURCES: Bailey & Love's Short Practice of Surgery; SRB's Manual of Surgery.THE CONCEPT
Dysphagia is difficulty in swallowing, and it is always a symptom to take seriously because it may signal cancer. The key to the topic is a logical classification, because the pattern of dysphagia points to the underlying cause. It is first divided by site into oropharyngeal (difficulty initiating the swallow, with coughing or nasal regurgitation) and oesophageal (food sticking after swallowing).
CLASSIFICATION BY CAUSE
Oesophageal dysphagia is usefully divided into mechanical (obstructive) and motility causes, and the mechanical causes by their relationship to the wall:
- Mechanical — in the lumen: an impacted foreign body or food bolus.
- Mechanical — in the wall: carcinoma, a peptic (or corrosive) stricture, and an oesophageal web (Plummer-Vinson).
- Mechanical — outside the wall: compression by a retrosternal goitre, mediastinal lymph nodes, or a vascular structure.
- Motility disorders: achalasia, systemic sclerosis (scleroderma), diffuse oesophageal spasm, and neuromuscular causes (bulbar/pseudobulbar palsy, myasthenia).
THE PATTERN TELLS THE STORY
The history is often diagnostic. Progressive dysphagia for solids that advances to liquids, with weight loss, suggests a mechanical, malignant cause (carcinoma). Dysphagia for solids and liquids equally from the outset, that is intermittent, suggests a motility disorder such as achalasia. Painful swallowing (odynophagia) suggests inflammation or ulceration.
INVESTIGATION
Upper GI endoscopy is the first-line investigation in most adults (to exclude cancer and biopsy), supplemented by a barium swallow (which shows strictures and the classic appearances of achalasia) and oesophageal manometry for motility disorders. New dysphagia in an older adult is an alarm symptom demanding urgent endoscopy.
SPECIFIC CAUSES BY AGE
The likely cause shifts with age and history. In a young patient, an oesophageal web (Plummer-Vinson), a ring, or eosinophilic oesophagitis is common; in the middle-aged, a peptic stricture or achalasia; and in the older patient with weight loss, carcinoma until proven otherwise. A neurological history points to an oropharyngeal (bulbar) cause such as stroke or motor neurone disease, where aspiration is the main danger.
SAFE MANAGEMENT PRINCIPLE
The governing rule is that new or progressive dysphagia is investigated promptly — never simply treated symptomatically — because the earlier a carcinoma or achalasia is found, the better the outcome. Assessment of swallowing safety and nutrition (with speech-and-language and dietetic input for oropharyngeal dysphagia) runs alongside finding the cause.
THE BOTTOM LINE
In summary, dysphagia is approached by pattern (progressive solids→liquids with weight loss = mechanical/malignant; solids and liquids together = motility), investigated first by endoscopy to exclude cancer, and never dismissed — early diagnosis of carcinoma or achalasia is what changes the outcome.
OROPHARYNGEAL VS OESOPHAGEAL — WHY IT MATTERS
Separating the two levels changes the whole workup. Oropharyngeal dysphagia is a problem of initiating the swallow — the patient coughs, chokes or regurgitates into the nose immediately, and the danger is aspiration; the causes are usually neuromuscular (stroke, Parkinson's, motor neurone disease, myasthenia) and assessment centres on swallow safety with speech-and-language therapy and videofluoroscopy. Oesophageal dysphagia is the sensation of food sticking seconds after swallowing, retrosternally, and is investigated by endoscopy and, where motility is suspected, manometry. Establishing which level is involved is the first and most useful step.
🔑KEY POINTS TO REMEMBER- Dysphagia = difficulty swallowing; a serious symptom (may be cancer).
- Classify by site (oropharyngeal vs oesophageal) and cause: mechanical (luminal/mural — carcinoma, stricture, web / extramural — goitre, nodes) vs motility (achalasia, scleroderma, spasm, bulbar palsy).
- Progressive solids→liquids + weight loss = mechanical/malignant; intermittent solids AND liquids = motility.
- Endoscopy is first-line (exclude cancer); add barium swallow and manometry; new dysphagia in older adults → urgent endoscopy.
📚SOURCES: Bailey & Love's Short Practice of Surgery.THE CONCEPT
Achalasia is a primary oesophageal motility disorder defined by two failures that occur together: failure of the lower oesophageal sphincter (LOS) to relax on swallowing, and loss of normal peristalsis in the body of the oesophagus. The underlying cause is degeneration of the ganglion cells of the myenteric (Auerbach's) plexus in the oesophageal wall, which removes the inhibitory neurons that normally allow the sphincter to relax — so the sphincter stays shut and food cannot pass.
CLINICAL FEATURES
The characteristic symptom is dysphagia for both solids and liquids from the outset (unlike the solids-first pattern of cancer), often long-standing and intermittent. There is also regurgitation of undigested food (with a risk of aspiration), chest pain, and gradual weight loss. Symptoms are frequently present for years before diagnosis.
INVESTIGATION
Three investigations build the diagnosis. A barium swallow shows the dilated oesophageal body tapering to a smooth 'bird-beak' (or 'rat-tail') narrowing at the sphincter. Oesophageal manometry is the diagnostic gold standard, demonstrating a high LOS pressure that fails to relax and absent peristalsis. Endoscopy is essential to exclude a carcinoma at the cardia mimicking achalasia ('pseudoachalasia').
MANAGEMENT & COMPLICATIONS
Treatment aims to reduce the LOS pressure so the oesophagus can empty: endoscopic pneumatic (balloon) dilatation, surgical Heller's cardiomyotomy (dividing the muscle of the sphincter, often with a fundoplication), the newer endoscopic POEM (per-oral endoscopic myotomy), or botulinum toxin injection in unfit patients. Long-standing achalasia carries an increased risk of squamous cell carcinoma of the oesophagus.
PATHOPHYSIOLOGY IN A LITTLE MORE DEPTH
The loss of inhibitory myenteric neurons (which use nitric oxide and VIP) is what prevents LOS relaxation, while the loss of coordinated ganglion function abolishes peristalsis — so the two cardinal manometric findings both stem from the same neuronal degeneration. In South America an identical picture is produced by Chagas' disease (Trypanosoma cruzi destroying the plexus), a useful comparison that reinforces the mechanism.
COMPLICATIONS & FOLLOW-UP
Untreated achalasia leads to a grossly dilated, food-retaining oesophagus with a risk of aspiration pneumonia and, over years, an increased risk of squamous carcinoma — so patients remain under review even after successful treatment. Treatments reduce but do not abolish this cancer risk, and reflux after myotomy is managed with PPIs.
THE BOTTOM LINE
Achalasia is therefore a myenteric-plexus disorder giving non-relaxing LOS and aperistalsis, recognised on the barium 'bird-beak' and confirmed on manometry, treated by reducing LOS pressure (dilatation, Heller's myotomy or POEM), with endoscopy always done first to exclude a mimicking cancer.
DIFFERENTIATING FROM CARCINOMA
A crucial clinical distinction is between achalasia and a carcinoma of the cardia producing 'pseudoachalasia'. Points favouring malignancy are a short history, older age, and marked weight loss, whereas true achalasia usually has a long, indolent course in a younger patient. Because the two can look identical on a barium swallow, endoscopy with biopsy is mandatory before treating what appears to be achalasia — a tumour at the gastro-oesophageal junction must never be dilated or myotomised in error.
🔑KEY POINTS TO REMEMBER- Achalasia = failure of LOS relaxation + loss of oesophageal peristalsis, from degeneration of myenteric (Auerbach's) plexus ganglion cells.
- Dysphagia for solids AND liquids from the start, regurgitation, chest pain, weight loss.
- Barium: dilated oesophagus with 'bird-beak' tapering; manometry is diagnostic (non-relaxing high-pressure LOS, aperistalsis); endoscopy to exclude cancer.
- Treat by pneumatic dilatation, Heller's cardiomyotomy or POEM (botulinum toxin if unfit).
- Increased long-term risk of squamous cell carcinoma.
📚SOURCES: Bailey & Love's Short Practice of Surgery.THE CONCEPT
A hiatus hernia is the herniation of part of the stomach upward through the oesophageal hiatus of the diaphragm into the thorax. It is common, especially with increasing age and obesity, and its importance lies in its relationship to reflux and, for one type, the risk of a surgical emergency. There are two main anatomical types, which behave quite differently and must be distinguished.
THE TWO TYPES
Type Anatomy Clinical behaviour Sliding (~90%) The gastro-oesophageal junction and cardia slide up through the hiatus into the chest Associated with gastro-oesophageal reflux Rolling / para-oesophageal (~5%) The gastric fundus rolls up alongside the oesophagus; the junction stays in the abdomen Little reflux, but risk of strangulation and gastric volvulus A mixed hernia has features of both.
FEATURES & DIAGNOSIS
A sliding hernia typically presents with the symptoms of reflux — heartburn and regurgitation. A rolling hernia may be asymptomatic or cause a sense of fullness, but can present dramatically if it strangulates or twists (volvulus), causing severe pain, retching with inability to vomit, and obstruction. Diagnosis is by barium swallow and upper GI endoscopy (which also assesses oesophagitis).
MANAGEMENT
A sliding hernia is managed like GORD — lifestyle measures and PPIs, with surgery (fundoplication and hiatal repair) only for refractory disease. A rolling (para-oesophageal) hernia is generally repaired surgically, often even when asymptomatic, because of the serious risk of strangulation and volvulus.
COMPLICATIONS OF THE ROLLING HERNIA
The reason a rolling hernia is repaired even when asymptomatic is the danger of gastric volvulus and strangulation: the herniated fundus can twist and obstruct, cutting off its blood supply. The classic warning is Borchardt's triad — severe epigastric pain, retching without the ability to vomit, and difficulty passing a nasogastric tube — which signals a strangulating gastric volvulus needing emergency surgery.
A NOTE ON MANAGEMENT
For the common sliding hernia, treatment is essentially that of reflux; surgery (laparoscopic fundoplication with reduction of the hernia and repair of the hiatus) is reserved for refractory or complicated disease. Large or para-oesophageal hernias are repaired electively where possible, before an emergency supervenes.
THE BOTTOM LINE
The examinable essence is the sliding-versus-rolling contrast: sliding hernia → reflux, treated medically; rolling (para-oesophageal) hernia → strangulation/volvulus risk (Borchardt's triad), treated by surgical repair even when asymptomatic.
RISK FACTORS & CLINICAL RELEVANCE
Hiatus hernia becomes commoner with age, obesity and raised intra-abdominal pressure (pregnancy, chronic cough, constipation), which is why weight loss is central to management of the associated reflux. Its clinical relevance is twofold: the very common sliding hernia is important as a driver of GORD and its complications (oesophagitis, stricture, Barrett's), while the uncommon rolling hernia matters because of its potential to present as a surgical emergency — a reminder that the same anatomical label covers two quite different clinical problems.
🔑KEY POINTS TO REMEMBER- Hiatus hernia = herniation of stomach through the diaphragmatic oesophageal hiatus.
- Sliding (~90%): gastro-oesophageal junction moves up → reflux; treat like GORD (lifestyle + PPI).
- Rolling/para-oesophageal (~5%): fundus herniates, junction stays → little reflux but risk of strangulation/volvulus.
- Diagnose by barium swallow + endoscopy.
- Rolling hernia → surgical repair (often even if asymptomatic) because of strangulation risk.
📚SOURCES: Bailey & Love's Short Practice of Surgery.THE CONCEPT
Zollinger-Ellison syndrome is caused by a gastrin-secreting tumour (a gastrinoma), usually located in the pancreas or the duodenal wall. The mechanism is straightforward and explains every feature: the tumour releases excess gastrin, which massively stimulates the gastric parietal cells to produce excess acid, and this acid hypersecretion causes severe, unusual peptic ulceration. It is a rare but important cause of ulcer disease that is easily missed if not considered.
CLINICAL FEATURES
The hallmark is peptic ulcers that are multiple, recurrent, refractory to standard treatment, and in atypical sites — for example ulcers extending into the second part of the duodenum or the jejunum. There is also diarrhoea (the large acid load damages the small bowel and inactivates pancreatic enzymes). Zollinger-Ellison syndrome should be suspected in any patient with severe, recurrent or H. pylori-negative ulcers.
ASSOCIATION, DIAGNOSIS & TREATMENT
About a quarter of cases occur as part of MEN 1 (with parathyroid and pituitary tumours), so this is screened for. Diagnosis rests on a raised fasting serum gastrin in the presence of high gastric acid, confirmed if needed by a secretin stimulation test (gastrin paradoxically rises). The tumour is then localised with imaging (CT/MRI, endoscopic ultrasound, somatostatin-receptor scintigraphy). Treatment is high-dose proton pump inhibitors to control acid, and surgical resection of the gastrinoma where it can be localised and is not metastatic.
WHY IT IS EASILY MISSED
Zollinger-Ellison syndrome is important precisely because it hides among ordinary ulcers. It should be actively suspected when ulcers are multiple, in unusual sites, recurrent after adequate treatment, associated with diarrhoea, or occur without H. pylori or NSAID use — otherwise the underlying gastrinoma is missed and the ulcers relentlessly recur despite standard therapy.
MANAGEMENT DETAIL
Acid control usually requires higher-than-standard doses of PPI, titrated to symptoms and acid output. Curative surgical resection is attempted for a localised, non-metastatic gastrinoma; where the tumour is part of MEN 1 or has metastasised (commonly to the liver), the emphasis shifts to acid control and management of the metastatic neuroendocrine tumour.
THE BOTTOM LINE
Zollinger-Ellison syndrome is a gastrinoma causing acid hypersecretion and multiple refractory ulcers with diarrhoea, diagnosed by a high fasting gastrin (± secretin test), linked to MEN 1, and treated with high-dose PPIs plus resection of the localised tumour.
RELATION TO NEUROENDOCRINE TUMOURS
The gastrinoma of Zollinger-Ellison syndrome is a neuroendocrine tumour, and this shapes its behaviour and treatment. Many are found in the 'gastrinoma triangle' around the head of the pancreas and duodenum, may be small and multiple (especially in MEN 1), and can be malignant with metastases to the liver. This is why localisation uses specialised imaging such as somatostatin-receptor scintigraphy, and why management ranges from curative resection of a solitary tumour to long-term acid suppression and neuroendocrine-tumour therapy for metastatic disease.
🔑KEY POINTS TO REMEMBER- Zollinger-Ellison syndrome = gastrin-secreting tumour (gastrinoma), usually pancreas/duodenum → excess gastrin → excess acid.
- Multiple, recurrent, refractory, atypically-sited peptic ulcers (± jejunal) + diarrhoea; suspect in severe/H. pylori-negative ulcers.
- ~25% part of MEN 1 (parathyroid + pituitary tumours).
- Diagnose with raised fasting gastrin (+ secretin stimulation test); localise by imaging.
- Treat with high-dose PPIs + surgical resection of the tumour.
📚SOURCES: Bailey & Love's Short Practice of Surgery.THE CONCEPT
Perforation is one of the most dramatic surgical emergencies, in which a peptic ulcer erodes completely through the wall of the stomach or duodenum, releasing gastric and duodenal contents into the peritoneal cavity. It is classically an anterior duodenal ulcer that perforates (an anterior ulcer has free peritoneum in front of it, whereas a posterior one erodes into the pancreas/artery and bleeds instead). The spilled acidic, then infected, contents cause a chemical and then bacterial peritonitis.
CLINICAL FEATURES
The presentation is characteristic: sudden, severe, constant epigastric pain that quickly becomes generalised as peritonitis develops. The patient lies still (movement worsens the pain), and examination reveals a rigid, 'board-like' abdomen with generalised tenderness and guarding, absent bowel sounds, and signs of shock. Loss of liver dullness to percussion may indicate free intraperitoneal gas.
INVESTIGATION
An erect chest X-ray is the classic investigation, showing free gas under the diaphragm (pneumoperitoneum) in about 70% of cases; a CT scan is more sensitive and is used if the diagnosis is uncertain. Blood tests show a raised white count and inflammatory markers.
MANAGEMENT
Management combines resuscitation and surgery. Resuscitate with the patient nil by mouth, a nasogastric tube, intravenous fluids, analgesia, broad-spectrum antibiotics and a PPI. Definitive treatment is usually surgery — closure of the perforation with an omental (Graham) patch and thorough peritoneal lavage (open or laparoscopic), followed later by H. pylori eradication. Selected, very well or very unfit patients may occasionally be managed non-operatively.
WHY ANTERIOR ULCERS PERFORATE
The anatomy explains the pattern neatly: an anterior duodenal ulcer has only the free peritoneal cavity in front of it, so it perforates into the peritoneum; a posterior ulcer instead erodes backwards into the pancreas and the gastroduodenal artery, so it tends to bleed rather than perforate. This is why perforation is characteristically an anterior-ulcer event and haemorrhage a posterior-ulcer event.
OUTCOME & DEFINITIVE CARE
Prognosis depends heavily on time to treatment — delay allows established peritonitis and sepsis, worsening outcome — so early diagnosis and surgery are vital. After recovery, the underlying ulcer diathesis is addressed by H. pylori eradication, stopping NSAIDs and PPI therapy, because the perforation is a complication of ulcer disease that will otherwise recur.
THE BOTTOM LINE
A perforated peptic ulcer is a classic acute abdomen — sudden pain, board-like rigidity and gas under the diaphragm — managed by resuscitation and prompt surgery (omental patch and lavage), with later H. pylori eradication to prevent recurrence.
PROGNOSTIC FACTORS & MODERN OPTIONS
Outcome depends on the Boey risk factors — shock on admission, a long delay before treatment (>24 h), and serious co-morbidity — each of which markedly increases mortality, underlining the value of prompt diagnosis and resuscitation. While open omental patch repair remains standard, a laparoscopic repair is increasingly used in stable patients, and a small, contained, sealed perforation in a well patient may occasionally be managed non-operatively with close monitoring, nasogastric drainage and antibiotics.
🔑KEY POINTS TO REMEMBER- Perforated peptic ulcer = full-thickness erosion (classically anterior duodenal ulcer) → peritonitis.
- Sudden severe generalised epigastric pain, board-like rigid abdomen, absent bowel sounds, shock; loss of liver dullness.
- Erect CXR: free gas under the diaphragm (~70%); CT if uncertain.
- Resuscitate (NBM, NG tube, IV fluids, analgesia, antibiotics, PPI) + surgery (omental/Graham patch + lavage) + later H. pylori eradication.
📚SOURCES: Bailey & Love's Short Practice of Surgery.THE CONCEPT
Gastric outlet obstruction is a mechanical blockage to the emptying of the stomach at or near the pylorus, so that ingested food cannot pass into the duodenum. The two important causes reflect a historical shift: traditionally it was a benign complication of chronic peptic ulceration (fibrosis and scarring narrowing the pylorus — 'cicatricial pyloric stenosis'), but with modern ulcer treatment the leading cause is now malignancy — a distal gastric carcinoma or a carcinoma of the head of the pancreas.
CLINICAL FEATURES
The stomach fills but cannot empty, so the patient has projectile vomiting of large volumes of undigested, non-bile-stained food (the obstruction is proximal to the bile duct), often hours after eating. There is early satiety, weight loss and dehydration, a visible gastric peristalsis in a thin patient, and a succussion splash (a splashing sound on shaking the abdomen, from retained fluid and food).
THE CLASSIC METABOLIC PICTURE
Persistent vomiting of acidic gastric juice loses hydrogen and chloride ions (and, secondarily, potassium), producing the characteristic hypochloraemic, hypokalaemic metabolic alkalosis with paradoxical aciduria — a favourite exam finding that must be corrected before any intervention.
MANAGEMENT
Management begins with resuscitation and correction of the fluid and electrolyte abnormality (isotonic saline with potassium), nasogastric decompression of the stomach, and nutritional support. The cause is then treated: benign strictures by endoscopic balloon dilatation or surgery, and malignant obstruction by resection, stenting or a bypass (gastrojejunostomy) as appropriate.
BENIGN VS MALIGNANT — THE KEY DISTINCTION
Distinguishing the cause matters greatly. A benign peptic stricture tends to occur in a patient with a long ulcer history, whereas malignant obstruction is suggested by a short history of weight loss, anorexia and anaemia in an older patient. Endoscopy with biopsy makes the distinction and is essential, because the treatment and prognosis differ entirely.
A NOTE ON RESUSCITATION
The metabolic derangement is not a footnote but a priority: the hypochloraemic, hypokalaemic metabolic alkalosis and dehydration must be corrected with saline and potassium before any endoscopy, dilatation or surgery, because operating on a dehydrated, alkalotic, hypokalaemic patient is dangerous. Nasogastric decompression relieves the distended stomach meanwhile.
THE BOTTOM LINE
Gastric outlet obstruction gives projectile non-bilious vomiting of undigested food with a hypochloraemic hypokalaemic metabolic alkalosis; it is now most often malignant, so correct the electrolytes, decompress, and biopsy at endoscopy before treating the cause.
A NOTE ON THE PAEDIATRIC MIMIC
It is worth distinguishing this acquired adult condition from infantile hypertrophic pyloric stenosis, a congenital cause of gastric outlet obstruction in babies (typically 3–6 weeks old) from hypertrophy of the pyloric muscle — presenting with projectile non-bilious vomiting, a palpable 'olive' and visible peristalsis, and the same hypochloraemic hypokalaemic metabolic alkalosis, but treated by Ramstedt's pyloromyotomy. Recognising the shared physiology (loss of gastric acid) while separating the very different causes and treatments is a common exam theme.
🔑KEY POINTS TO REMEMBER- Gastric outlet obstruction = mechanical block to gastric emptying at the pylorus.
- Causes: chronic peptic ulcer scarring (benign) and distal gastric/pancreatic carcinoma (now the leading cause).
- Projectile non-bilious vomiting of undigested food, visible peristalsis, succussion splash, weight loss, dehydration.
- Classic hypochloraemic hypokalaemic metabolic alkalosis (loss of gastric HCl).
- Correct fluids/electrolytes + NG decompression first, then treat the cause (dilatation/surgery, or manage the cancer).
📚SOURCES: Bailey & Love's Short Practice of Surgery.THE CONCEPT — METAPLASIA FROM REFLUX
Barrett's oesophagus is a metaplastic change in the lining of the lower oesophagus, in which the normal stratified squamous epithelium is replaced by columnar (intestinal-type) epithelium. It is a direct consequence of chronic acid reflux (GORD): the squamous lining, not built to withstand acid, adapts by changing into a more acid-resistant columnar type. Its great importance is that this metaplasia is premalignant — it is the recognised precursor of oesophageal adenocarcinoma.
THE PATHWAY TO CANCER
Barrett's mucosa can progress through a stepwise sequence of metaplasia → low-grade dysplasia → high-grade dysplasia → adenocarcinoma. Although the annual risk of cancer for any individual is small, it is significantly higher than in the general population, which is the rationale for surveillance. This is why chronic reflux is not dismissed as trivial.
DIAGNOSIS
Barrett's is identified at upper GI endoscopy, where the columnar mucosa appears as salmon-pink tongues extending up from the gastro-oesophageal junction (in contrast to the pale squamous lining), and confirmed by biopsy showing intestinal metaplasia. Biopsies are also assessed for the presence and grade of dysplasia, which determines management.
MANAGEMENT
Management has two aims — control the reflux and monitor for (or treat) neoplastic change. Patients are given long-term proton pump inhibitors and enrolled in surveillance endoscopy with biopsies at intervals determined by the length of Barrett's and the presence of dysplasia. Dysplasia is treated endoscopically — by radiofrequency ablation and endoscopic mucosal resection (EMR) of visible lesions — which can eradicate dysplastic Barrett's and prevent progression to cancer.
WHO AND HOW TO SURVEIL
Not everyone with reflux develops Barrett's, and not all Barrett's needs the same follow-up. Surveillance intervals depend on the length of the Barrett's segment and the grade of dysplasia, with non-dysplastic short-segment disease reviewed infrequently and dysplastic disease managed intensively. Systematic quadrantic biopsies along the segment are taken to detect dysplasia that may not be visible.
TREATMENT OF DYSPLASIA
The advent of endoscopic therapy has transformed management: endoscopic mucosal resection removes visible nodular lesions for accurate staging, and radiofrequency ablation destroys the remaining dysplastic Barrett's mucosa, allowing normal squamous epithelium to regrow. This can eradicate high-grade dysplasia and early cancer without the major morbidity of an oesophagectomy, provided the disease is caught before it invades deeply.
THE BOTTOM LINE
Barrett's oesophagus is columnar metaplasia from chronic reflux and the premalignant precursor of adenocarcinoma; it is managed with long-term PPIs and surveillance endoscopy, with dysplasia treated endoscopically by radiofrequency ablation and mucosal resection.
A NOTE ON RISK STRATIFICATION
The clinical value of Barrett's is that it identifies a group who can be watched so that cancer is caught early, but the risk must be kept in perspective: for most patients with non-dysplastic Barrett's the annual risk of progression to cancer is low (well under 1%), so surveillance is balanced against its burden. Risk is higher with long segments, male sex, and any degree of dysplasia — factors that intensify surveillance and, for dysplasia, trigger endoscopic treatment. Reassurance for the low-risk majority is as much a part of management as vigilance for the few.
🔑KEY POINTS TO REMEMBER- Barrett's oesophagus = metaplasia of lower oesophageal squamous epithelium to columnar (intestinal) epithelium, caused by chronic GORD.
- Premalignant: metaplasia → low- then high-grade dysplasia → adenocarcinoma.
- Diagnosed at endoscopy (salmon-pink columnar tongues) + biopsy (intestinal metaplasia ± dysplasia).
- Manage with long-term PPIs + surveillance endoscopy; treat dysplasia endoscopically (radiofrequency ablation, EMR).
📚SOURCES: Bailey & Love's Short Practice of Surgery.