Define Dysphagia. Describe its classification, investigations, causes and management.

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.

Progression from solids to liquids suggests a growing obstruction.

• 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.