Complete ENT (Otorhinolaryngology) question bank — ear, nose, throat, larynx, airway & head-neck — in explanation-first exam-topper style, with 72 diagrams.
12chapters144questions77High-Yield
THE CONCEPT
The nasal septum divides the nose into two cavities; a deviation of the septum (cartilaginous or bony) from the midline is very common (few septa are perfectly straight), but it becomes significant only when it causes symptoms (obstruction) or complications.
Deviated nasal septum (coronal)
spur
deviated side (narrow)
wider side → compensatory
turbinate hypertrophy
turbinate
A deviated nasal septum: the septum bends away from the midline (here to one side, often with a spur at the bony-cartilaginous junction), narrowing one nasal cavity; the wider, concave side commonly develops compensatory hypertrophy of its turbinate.
AETIOLOGY & TYPES
It results from developmental factors (differential growth of the septum and palate), trauma (at birth, in childhood or an adult nasal injury) or congenital causes. Recognised types include an anterior (caudal) dislocation into the vestibule, a C- or S-shaped deviation, and a spur (a sharp bony/cartilaginous projection at the junction, which may cause a contact headache or epistaxis).
CLINICAL FEATURES
Nasal obstruction (on the deviated side, or alternating).
Compensatory hypertrophy of the turbinate on the concave (wider) side.
Headache (a contact point/spur), hyposmia/anosmia, recurrent sinusitis (blocked drainage), epistaxis and snoring.
An external deformity if the nasal bones are also deviated.
MANAGEMENT
An asymptomatic deviation needs no treatment. Symptomatic cases are treated surgically: septoplasty (a conservative repositioning/preservation of the septum — preferred) or submucous resection (SMR — removing the deviated cartilage/bone, an older technique), with septorhinoplasty if there is an external deformity. Surgical complications include septal perforation, haematoma, a saddle deformity and adhesions.
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CLINICAL PEARL: A deviated nasal septum = displacement of the septum from the midline (developmental or traumatic), significant when symptomatic. It causes nasal obstruction (deviated side) with compensatory turbinate hypertrophy (concave side), headache (a contact point/spur), recurrent sinusitis, epistaxis and snoring. Treat symptomatic cases with septoplasty (conservative, preferred) or SMR, and septorhinoplasty if there is an external deformity.
WHY A DEVIATION CAUSES MORE THAN JUST A BLOCKED NOSE
It is worth understanding that a deviated septum does more than simply narrow one airway; it disturbs the whole balance of nasal function. The deviation obstructs airflow on the narrow side, and the body responds on the wider (concave) side with compensatory turbinate hypertrophy, which over time can leave both sides feeling blocked. By disturbing the normal airflow and, importantly, obstructing the drainage pathways of the sinuses (the osteomeatal complex), a deviation predisposes to recurrent sinusitis. A spur pressing on the opposite lateral wall can trigger contact-point headaches, and the stretched, exposed mucosa over a deviation is prone to drying and epistaxis. Seeing the deviation as a disturbance of airflow, drainage and mucosal health — not merely a mechanical narrowing — explains why its effects are so varied and why correcting it can relieve several apparently unrelated symptoms.
SEPTOPLASTY VERSUS THE OLDER SMR
A point of practical and historical interest is the shift from the older submucous resection (SMR) to the modern septoplasty, which reflects a change in surgical philosophy. In the traditional SMR, large amounts of deviated septal cartilage and bone were removed — effective, but leaving the septum weakened and carrying a higher risk of septal perforation and a saddle-nose deformity from loss of support. Modern septoplasty is conservative: the deviated portions are repositioned, reshaped or only selectively removed, preserving as much of the supporting framework as possible, which maintains the shape of the nose and reduces complications. This move toward tissue preservation rather than radical removal mirrors the same 'functional' philosophy seen in modern sinus surgery, and is why septoplasty is now the preferred operation for a symptomatic deviated septum.
THE BOTTOM LINE
A deviated nasal septum is a common condition, treated only when it causes obstruction, recurrent sinusitis, headache or epistaxis, by conservative septoplasty that corrects the airway while preserving the septal framework.
A NOTE ON ASSESSING THE PATIENT
A practical point in assessing a deviated septum is that the examination must include decongesting the nose before judging the significance of the deviation. Applying a topical decongestant shrinks any hypertrophied turbinates, allowing the surgeon to see the true septal deviation and to distinguish obstruction caused by the septum from that caused by mucosal/turbinate swelling — an important distinction, since the two are treated differently and often coexist. Nasal endoscopy further assesses the posterior septum and the effect on sinus drainage, and correlating the patient's symptomatic side with the anatomical findings is essential, because not every visible deviation is the cause of the symptoms. This careful assessment ensures that surgery is offered only when the deviation genuinely explains the patient's obstruction.
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KEY POINTS / NUMBERS (viva)
Deviated nasal septum = septum displaced from midline (developmental / trauma at birth/childhood/adult); common, significant only if symptomatic.
SOURCES: Dhingra — Diseases of Ear, Nose and Throat; Scott-Brown's Otorhinolaryngology.
THE CONCEPT
Rhinosinusitis is inflammation of the mucosa of the nose and paranasal sinuses (they are continuous, so both are involved). Acute rhinosinusitis lasts <4 weeks (with complete resolution), usually following a viral upper-respiratory infection, sometimes with bacterial superinfection.
Paranasal sinuses & the osteomeatal complex
frontal
ethmoids
maxillary
maxillary
nasal cavity
OMC — middle meatus
(drains frontal, maxillary,
anterior ethmoid)
Obstruction of this common drainage channel is the key event in rhinosinusitis
The paranasal sinuses and the osteomeatal complex: the frontal, maxillary and anterior ethmoid sinuses all drain through a narrow common channel in the middle meatus (the OMC). Oedema obstructing this channel is the central event in rhinosinusitis.
PATHOPHYSIOLOGY & ORGANISMS
Mucosal oedema (post-viral/allergic) obstructs the sinus ostia — especially the osteomeatal complex draining the frontal/maxillary/anterior ethmoid sinuses — impairing mucociliary clearance and ventilation, so secretions stagnate and become secondarily infected. The usual bacteria are Streptococcus pneumoniae, Haemophilus influenzae and Moraxella catarrhalis. Predisposing factors include a viral URI (commonest), allergic rhinitis, a deviated septum/anatomical variants, nasal polyps, dental infection (maxillary) and immunodeficiency.
CLINICAL FEATURES
Nasal obstruction/congestion with purulent nasal (or postnasal) discharge.
Facial pain/pressure over the affected sinus, worse on bending forward — cheek/toothache (maxillary), forehead (frontal), between the eyes (ethmoid), vertex/retro-orbital (sphenoid).
Hyposmia/anosmia, fever and malaise (if bacterial), with tenderness over the sinus.
Symptoms persisting >10 days or worsening after initial improvement ('double sickening') suggest a bacterial cause.
MANAGEMENT
Diagnosis is clinical (with nasal endoscopy showing pus in the middle meatus; CT is not routine). Most cases are viral and self-limiting, treated symptomatically (analgesia, short-term decongestants, saline irrigation, intranasal steroids); antibiotics (amoxicillin/amoxiclav) are added for a bacterial picture (severe, persistent >10 days or worsening), while watching for complications.
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CLINICAL PEARL: Acute rhinosinusitis = inflammation of the nose + sinus mucosa (<4 weeks), usually post-viral ± bacterial superinfection (S. pneumoniae, H. influenzae, M. catarrhalis); ostial (OMC) obstruction → stasis → infection. It gives nasal block + purulent discharge + facial pain/pressure (worse bending forward) and hyposmia. A bacterial cause is likely if >10 days, worsening or 'double-sickening'. Treat symptomatically (saline, decongestant, intranasal steroid); antibiotics (amoxiclav) if bacterial; watch for complications.
WHY THE OSTEOMEATAL COMPLEX IS CENTRAL
The single most important concept in understanding sinusitis is the role of the osteomeatal complex (OMC) — the narrow common channel in the middle meatus through which the frontal, maxillary and anterior ethmoid sinuses all drain. Because these major sinuses share this one bottleneck, anything that causes mucosal swelling there — a viral cold, allergy, a polyp or an anatomical narrowing — blocks the drainage of all of them at once. Once the ostia are obstructed, mucus stagnates, ventilation falls, the mucociliary clearance mechanism fails, and the trapped secretions become an ideal medium for bacterial growth. This is why sinusitis so often follows a simple cold, why it tends to involve these particular sinuses together, and why the whole logic of treatment — medical and surgical — is directed at relieving the obstruction and restoring drainage at the OMC rather than simply killing bacteria.
WHEN TO SUSPECT A BACTERIAL CAUSE
A practically important skill is knowing when an acute rhinosinusitis has become bacterial and warrants antibiotics, since the great majority of cases are viral and self-limiting. The features that suggest a bacterial process are symptoms persisting beyond about ten days without improvement, an initial improvement followed by worsening (the classic 'double sickening'), and severe illness with high fever, purulent discharge and marked facial pain. Recognising these avoids two opposite errors: prescribing antibiotics needlessly for a self-limiting viral illness (contributing to resistance and side-effects), and missing a genuine bacterial sinusitis that could progress to a serious orbital or intracranial complication. This is why guidelines emphasise symptomatic treatment for most cases and reserve antibiotics (amoxicillin/amoxiclav) for those meeting these specific criteria — a good example of judicious antibiotic use.
THE BOTTOM LINE
Acute rhinosinusitis is a usually post-viral inflammation centred on obstruction of the osteomeatal complex, managed symptomatically in most cases, with antibiotics reserved for bacterial features and vigilance for orbital or intracranial spread.
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KEY POINTS / NUMBERS (viva)
Acute rhinosinusitis = nose + sinus mucosal inflammation <4 weeks, usually post-viral URI ± bacterial (S. pneumoniae, H. influenzae, M. catarrhalis).
Bacterial likely if >10 days, worsening, or 'double sickening'; endoscopy shows pus in the middle meatus.
Treat symptomatically (saline, short-term decongestant, intranasal steroid); antibiotics (amoxiclav) if bacterial; watch for complications.
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SOURCES: Dhingra — Diseases of Ear, Nose and Throat; Scott-Brown's Otorhinolaryngology.
THE CONCEPT
Chronic rhinosinusitis (CRS) is symptomatic inflammation of the nose and paranasal sinuses lasting ≥12 weeks. It has two phenotypes: CRS with nasal polyps (CRSwNP) and CRS without nasal polyps (CRSsNP).
PATHOPHYSIOLOGY
There is persistent mucosal inflammation with impaired mucociliary clearance and ostial (osteomeatal-complex) obstruction, leading to chronic infection/inflammation; it is multifactorial (allergy, biofilms, anatomical variants, immune factors and fungi).
CLINICAL FEATURES
The diagnosis needs ≥2 symptoms for ≥12 weeks, at least one being nasal obstruction or nasal discharge:
Nasal obstruction/congestion.
Nasal discharge (anterior or postnasal, mucopurulent).
Facial pain/pressure/fullness.
Reduction or loss of smell (hyposmia/anosmia); ± cough in children.
Examination uses endoscopy (mucopurulent discharge, oedema or polyps in the middle meatus) and CT (mucosal thickening, opacification and anatomical variants — for surgical planning). Recognised associations are eosinophilic CRSwNP with asthma and aspirin sensitivity (Samter's triad), and allergic fungal rhinosinusitis.
MANAGEMENT
Management is medical first: nasal saline irrigation, intranasal corticosteroids (the mainstay), treatment of allergy, prolonged/macrolide antibiotics for exacerbations, and short courses of oral steroids for polyps. If medical therapy fails, functional endoscopic sinus surgery (FESS) restores drainage/ventilation of the OMC and removes polyps/diseased tissue, alongside treatment of the underlying allergy/asthma.
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CLINICAL PEARL: Chronic rhinosinusitis (CRS) = nose + sinus inflammation for ≥12 weeks; phenotypes CRSwNP vs CRSsNP. Needs ≥2 symptoms (nasal block, discharge, facial pain/pressure, hyposmia). Assess with endoscopy + CT (planning). Manage medically first (saline irrigation + intranasal steroids [mainstay], treat allergy, antibiotics/oral steroids), then FESS if medical therapy fails (restore OMC drainage). Associations: asthma + aspirin sensitivity (Samter's).
HOW CHRONIC DIFFERS FROM ACUTE DISEASE
It is important to appreciate that chronic rhinosinusitis is not simply an acute infection that has lasted longer, but a distinct, persistent inflammatory disease. Whereas acute rhinosinusitis is typically a self-limiting, largely infective process following a cold, chronic rhinosinusitis (defined by symptoms for ≥12 weeks) is driven by ongoing mucosal inflammation with contributions from allergy, impaired mucociliary clearance, biofilms, anatomical narrowing and, in some, an eosinophilic or fungal process. This is why its management differs fundamentally: rather than a course of antibiotics, it relies on sustained anti-inflammatory treatment — above all long-term intranasal corticosteroids and saline irrigation — to control the underlying inflammation, with surgery reserved for those who fail. Understanding chronic rhinosinusitis as an inflammatory rather than purely infective condition explains why 'just another antibiotic' is so often the wrong approach.
WHY MEDICAL THERAPY COMES FIRST AND SURGERY SECOND
A key principle in chronic rhinosinusitis is that maximal medical therapy is tried before surgery, and understanding why clarifies the whole treatment pathway. Because the disease is fundamentally inflammatory, much of it can be controlled by reducing inflammation and improving drainage medically — with intranasal corticosteroids (the mainstay), saline irrigation, treatment of any allergy and, where appropriate, antibiotics or short oral steroid courses. Many patients improve substantially on this alone and avoid an operation. FESS is reserved for those whose symptoms persist despite adequate medical treatment, and even then it is 'functional' — aiming to restore the natural drainage of the OMC rather than to strip the sinuses — and it works best when combined with continued medical therapy afterwards to control the underlying inflammation. This stepwise, medical-first approach spares many patients surgery and gives the best long-term results for those who do need it.
THE BOTTOM LINE
Chronic rhinosinusitis is a persistent inflammatory disease treated first with intranasal steroids and saline irrigation and then, if these fail, with functional endoscopic surgery to restore osteomeatal drainage.
A NOTE ON THE ROLE OF ALLERGY AND ASTHMA
An important theme in chronic rhinosinusitis is its close relationship with allergy and asthma, reflecting the concept of a single, unified airway. The nose and the lower airways share a continuous mucosa, so the eosinophilic inflammation that drives asthma and allergic disease frequently also drives chronic rhinosinusitis, especially the polyp-forming (CRSwNP) form. This is why patients with severe nasal polyps so often have coexisting asthma and, in the aspirin-sensitive, the full Samter's triad, and why controlling the sinus disease in isolation is difficult if the associated allergy and asthma are neglected. Recognising this link means that good management addresses the whole airway — treating allergy, optimising asthma control and, increasingly, using biologic therapies targeting the underlying type-2 inflammation in severe polyp disease — rather than focusing on the nose alone.
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KEY POINTS / NUMBERS (viva)
Chronic rhinosinusitis (CRS) = symptomatic nose + sinus inflammation ≥12 weeks; CRS with polyps (CRSwNP) vs without (CRSsNP).
Diagnosis: ≥2 symptoms for ≥12 weeks (≥1 of nasal obstruction/discharge) + facial pain/pressure + hyposmia; confirmed on endoscopy/CT.
Medical (first line): saline irrigation + intranasal corticosteroids (mainstay), treat allergy, prolonged/macrolide antibiotics, short oral steroids (polyps). FESS if medical fails (restores OMC drainage). Associations: asthma, aspirin sensitivity (Samter's triad), allergic fungal rhinosinusitis.
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KEY POINTS TO REMEMBER
Chronic rhinosinusitis = nose + sinus inflammation ≥12 weeks; phenotypes CRSwNP (with polyps) vs CRSsNP (without).
Diagnosis: ≥2 symptoms for ≥12 weeks (≥1 of nasal obstruction/discharge) plus facial pain/pressure and hyposmia.
Assess with nasal endoscopy (discharge/oedema/polyps) and CT (mucosal disease, anatomical variants — for surgery).
Medical first: saline irrigation + intranasal corticosteroids (mainstay), treat allergy, antibiotics, oral steroids for polyps.
FESS if medical therapy fails (restores OMC drainage/ventilation); associations — asthma, aspirin sensitivity (Samter's).
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SOURCES: Dhingra — Diseases of Ear, Nose and Throat; Scott-Brown's Otorhinolaryngology.
THE CONCEPT
Nasal polyps are benign, oedematous, pedunculated masses of chronically inflamed, prolapsed sinonasal mucosa. There are two main types: ethmoidal (multiple, bilateral) and antrochoanal (single, from the maxillary antrum).
Nasal polyps
Ethmoidal (multiple, bilateral)
pale, grape-like, insensitive; allergy/asthma/aspirin
Antrochoanal (single)
maxillaryantrum
→ choana /nasopharynx
Killian's polyp: from antrum → dumbbell to choana
Nasal polyps: ethmoidal polyps are multiple and bilateral (pale, grape-like, insensitive; linked to allergy/asthma/aspirin sensitivity), whereas an antrochoanal (Killian's) polyp is single, arising in the maxillary antrum and passing back through the ostium to the choana as a dumbbell.
ETHMOIDAL POLYPS
These are multiple and bilateral, arising from the ethmoid sinuses/middle meatus in adults, associated with allergy/asthma, chronic rhinosinusitis and aspirin sensitivity (Samter's triad = asthma + nasal polyps + aspirin sensitivity); bilateral polyps in a child should raise the suspicion of cystic fibrosis. They are pale, glistening, grape-like, insensitive to touch and do not bleed, and cause bilateral nasal obstruction, anosmia, rhinorrhoea and a nasal intonation.
ANTROCHOANAL POLYP (Killian's polyp)
This is a single, unilateral polyp arising from the maxillary antrum mucosa, passing through the ostium into the middle meatus and extending backwards to the choana/nasopharynx (a dumbbell shape), typically in children and young adults, causing unilateral nasal obstruction.
DIAGNOSIS & MANAGEMENT
WHY THE TWO TYPES BEHAVE SO DIFFERENTLY
The contrast between ethmoidal and antrochoanal polyps is a favourite examination theme because the two differ in almost every respect, and the differences flow from their origins. Ethmoidal polyps arise from the diffusely inflamed mucosa of the ethmoid sinuses, so they are multiple and bilateral, reflect a generalised mucosal disease (allergy, asthma, aspirin sensitivity) and characteristically recur after removal because the underlying inflammation persists. An antrochoanal polyp arises from a single focus in the maxillary antrum, so it is solitary and unilateral, and grows as a dumbbell out through the ostium and back to the choana; because it stems from one localised origin, removing that origin cures it. Grasping that ethmoidal polyps are the visible tip of a diffuse bilateral mucosal disease, whereas an antrochoanal polyp is a single localised growth, explains their differing presentation, treatment and tendency to recur.
THE UNILATERAL POLYP AS A RED FLAG
A crucial safety lesson in the assessment of nasal polyps is that a solitary, unilateral polyp — particularly one that bleeds — must never be assumed to be benign. While typical ethmoidal polyps are bilateral, pale, insensitive and non-bleeding, a unilateral mass may instead be an inverted papilloma (which can harbour malignancy) or a frank sinonasal carcinoma, and these can masquerade as an innocent polyp. This is why a unilateral or bleeding 'polyp' in an adult is always biopsied and imaged rather than simply removed and forgotten. The principle — that unilateral nasal pathology is sinister until proven otherwise — parallels the same rule for unilateral otalgia or a unilateral tonsillar mass, and is one of the most important habits to build when assessing the nose.
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DANGER / REMEMBER: Diagnosis is by rhinoscopy/endoscopy and CT (to show the extent and the antral origin of an antrochoanal polyp); a unilateral, bleeding polyp in an adult must be biopsied to exclude a neoplasm (malignancy/inverted papilloma). Ethmoidal polyps are treated with intranasal + short oral steroids and FESS if these fail (recurrence is common); an antrochoanal polyp needs surgical removal including its antral origin/attachment (or it recurs).
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CLINICAL PEARL: Nasal polyps = benign oedematous prolapsed sinonasal mucosa. Ethmoidal (multiple, bilateral; allergy/asthma/aspirin [Samter's]; in a child → suspect cystic fibrosis; pale, insensitive, don't bleed) versus antrochoanal (Killian's — single, unilateral, from the maxillary antrum → choana/nasopharynx, young). Treat ethmoidal with steroids + FESS (recurs); antrochoanal with surgical removal including the antral origin. A unilateral polyp in an adult → biopsy (exclude neoplasm).
Nasal polyps = benign oedematous prolapsed sinonasal mucosa; two types — ethmoidal (multiple/bilateral) and antrochoanal (single/unilateral).
Ethmoidal: adults, bilateral, from ethmoids; allergy/asthma/aspirin (Samter's triad); bilateral polyps in a child → suspect cystic fibrosis; pale, insensitive, don't bleed.
Antrochoanal (Killian's): single, unilateral, from the maxillary antrum → choana/nasopharynx (dumbbell); young patients.
Ethmoidal Rx: intranasal + short oral steroids, FESS if fails (recurs); antrochoanal Rx: surgical removal including the antral origin.
A unilateral, bleeding polyp in an adult must be biopsied (exclude malignancy/inverted papilloma).
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SOURCES: Dhingra — Diseases of Ear, Nose and Throat.
THE CONCEPT
Sinusitis — especially acute sinusitis in children — can spread beyond the sinus to cause serious orbital and intracranial complications, because the sinuses are closely related to the orbit (separated only by the paper-thin lamina papyracea) and the cranial cavity. These are emergencies.
Orbital complications of sinusitis (Chandler)
ethmoid(lamina papyracea)
spread →
1 preseptal (lid) · 2 orbital cellulitis (proptosis, chemosis)
3 subperiosteal · 4 orbital abscess · 5 cavernous sinus thrombosis
proptosis, ↓vision,ophthalmoplegia
= EMERGENCY
Orbital complications of sinusitis (Chandler): infection spreads from the ethmoid through the paper-thin lamina papyracea into the orbit, progressing from preseptal (lid) cellulitis to orbital cellulitis, subperiosteal and orbital abscess, and finally cavernous sinus thrombosis. Proptosis, reduced vision or ophthalmoplegia signal an emergency.
ROUTES & ORBITAL COMPLICATIONS
Spread occurs by direct bone erosion (the thin lamina papyracea between the ethmoid and orbit), thrombophlebitis of valveless veins, or congenital dehiscences. The orbital complications (Chandler classification), commonest from ethmoid sinusitis in children, progress as:
Preseptal (periorbital) cellulitis — eyelid oedema, anterior to the orbital septum.
Understanding why orbital complications arise particularly from ethmoid sinusitis in children explains much about this dangerous group of conditions. The ethmoid sinuses lie directly against the orbit, separated only by the wafer-thin lamina papyracea ('paper plate'), which is easily breached by infection or has natural dehiscences. In children the ethmoids are among the first sinuses to develop and are a common site of infection, and the thin bone and valveless veins allow infection to spread readily from the ethmoid into the orbit. This is why a child with ethmoid sinusitis who develops eyelid swelling must be watched extremely carefully for progression into the orbit, and why orbital cellulitis in children so often has a sinus origin. The anatomy — a thin bone between an infected sinus and the eye — is the whole explanation.
RECOGNISING THE POINT OF EMERGENCY
The most important practical skill with these complications is recognising the moment a periorbital infection crosses from a relatively benign preseptal cellulitis into a sight- and life-threatening postseptal (orbital) process. Preseptal cellulitis — confined in front of the orbital septum — causes eyelid swelling and redness but with normal eye movements, normal vision and no proptosis, and is treated with antibiotics. The alarm signs of postseptal spread are proptosis, painful or restricted eye movements (ophthalmoplegia), reduced visual acuity, and chemosis — any of which signals orbital cellulitis or abscess and demands urgent CT, intravenous antibiotics and often surgical drainage, with ophthalmology and, if needed, neurosurgery involved. Because delay can cost the eye or the life, the clinician's key task is to keep checking vision and eye movements and to act immediately the instant these features appear.
THE BOTTOM LINE
The orbital and intracranial complications of sinusitis are emergencies, most often from ethmoid sinusitis in children, in which proptosis, reduced vision or ophthalmoplegia signal postseptal spread demanding urgent imaging, intravenous antibiotics and drainage.
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DANGER / REMEMBER:Proptosis, ophthalmoplegia, reduced visual acuity or chemosis indicate a postseptal (orbital) process — a sight- and life-threatening emergency needing urgent CT, IV antibiotics and drainage.
INTRACRANIAL & OSSEOUS COMPLICATIONS
Intracranial complications include meningitis, extradural/subdural abscess, brain abscess (especially the frontal lobe from frontal sinusitis), cavernous sinus thrombosis and superior sagittal sinus thrombosis. Osseous complications include frontal-bone osteomyelitis — a subperiosteal abscess of the frontal bone is a 'Pott's puffy tumour'. Management is urgent CT, IV broad-spectrum antibiotics, surgical drainage of the abscess/sinus (FESS or external) and involvement of ophthalmology/neurosurgery.
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CLINICAL PEARL: Sinusitis complications (emergencies, especially in children/ethmoid): orbital (Chandler — preseptal → orbital cellulitis [proptosis, chemosis, ophthalmoplegia, ↓vision] → subperiosteal → orbital abscess → cavernous sinus thrombosis; spread via the thin lamina papyracea), intracranial (meningitis, brain/epidural/subdural abscess, cavernous sinus thrombosis) and osseous (frontal osteomyelitis = Pott's puffy tumour). Red flags — proptosis/↓vision/ophthalmoplegia → urgent CT + IV antibiotics + drainage.
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KEY POINTS / NUMBERS (viva)
Sinusitis spreads to orbit/cranium via the thin lamina papyracea, valveless-vein thrombophlebitis, or dehiscences; commonest — orbital, from ethmoid sinusitis in children.
Orbital (Chandler): 1 preseptal (lid) cellulitis → 2 orbital cellulitis (proptosis, chemosis, ophthalmoplegia, ↓vision) → 3 subperiosteal abscess → 4 orbital abscess → 5 cavernous sinus thrombosis.
Red flags (proptosis, ↓vision, ophthalmoplegia) → urgent CT + IV antibiotics + surgical drainage; involve ophthalmology/neurosurgery.
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SOURCES: Dhingra — Diseases of Ear, Nose and Throat; Scott-Brown's Otorhinolaryngology.
THE CONCEPT
The lateral wall of the nose bears three (sometimes four) scroll-like turbinates (conchae) — inferior, middle and superior (± supreme) — and beneath each a corresponding meatus.
Lateral wall of the nose (turbinates & meatuses)
superior turbinate
middle turbinate
inferior turbinate
sphenoethmoidal recess → sphenoid
superior meatus → posterior ethmoid
middle meatus → frontal, maxillary, ant. ethmoid (OMC)
inferior meatus → nasolacrimal duct
The lateral wall of the nose carries three turbinates with a meatus beneath each: the inferior meatus drains the nasolacrimal duct; the middle meatus (the OMC) drains the frontal, maxillary and anterior ethmoid sinuses; the superior meatus drains the posterior ethmoids; and the sphenoethmoidal recess drains the sphenoid.
DRAINAGE
Inferior meatus: the nasolacrimal duct.
Middle meatus: the frontal sinus, maxillary sinus and anterior ethmoid air cells — the osteomeatal complex (OMC), the key drainage area whose obstruction causes sinusitis.
Superior meatus: the posterior ethmoid air cells.
Sphenoethmoidal recess (above the superior turbinate): the sphenoid sinus.
CLINICAL RELEVANCE
The inferior turbinate is a separate bone, whereas the middle and superior turbinates are part of the ethmoid. Clinically, the OMC (middle meatus) is the crucial drainage bottleneck targeted in FESS.
A NOTE ON THE CLINICAL IMPORTANCE OF THE OMC
The reason the anatomy of the lateral nasal wall matters so much clinically is that it identifies the osteomeatal complex as the strategic key to sinus disease. Because the frontal, maxillary and anterior ethmoid sinuses all drain into the narrow middle meatus, this small area is the common gateway whose blockage causes most sinusitis and whose surgical clearance (in FESS) restores drainage to all three sinuses at once. Knowing which sinus drains where also has diagnostic value — for example, a discharge seen high in the sphenoethmoidal recess points to the sphenoid, whereas pus in the middle meatus implicates the OMC sinuses. This is why the arrangement of turbinates and meatuses, far from being dry anatomy, underpins the whole understanding and surgical management of sinus disease.
THE BOTTOM LINE
The lateral nasal wall's turbinates and meatuses organise sinus drainage, with the osteomeatal complex in the middle meatus the key channel whose obstruction causes sinusitis and which FESS aims to restore.
A further clinical point is that surgeons and endoscopists use these turbinates and meatuses as fixed landmarks when navigating the nasal cavity: the middle turbinate, for instance, is a key reference point for safely entering the middle meatus and the ethmoids during endoscopic surgery, so a sound grasp of this anatomy is essential not only for understanding sinus drainage but for operating safely within the nose.
It is also worth noting that the inferior turbinate, being a separate bone with its own rich blood supply, is a common site of the hypertrophy that accompanies rhinitis and a deviated septum, and is therefore frequently the target of turbinate-reduction procedures — another reason a clear understanding of this anatomy is directly relevant to everyday nasal practice.
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KEY POINTS TO REMEMBER
Lateral nasal wall: three turbinates (inferior, middle, superior ± supreme), each with a meatus beneath.
Superior meatus → posterior ethmoid; sphenoethmoidal recess → sphenoid sinus.
Inferior turbinate = separate bone; middle/superior = part of ethmoid; the OMC (middle meatus) is the key drainage area targeted in FESS.
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SOURCES: Dhingra — Diseases of Ear, Nose and Throat.
THE CONCEPT
A septal haematoma is a collection of blood between the mucoperichondrium and the septal cartilage, usually after nasal trauma or septal surgery. It presents as a bilateral, smooth, soft/fluctuant swelling of the septum causing nasal obstruction.
Septal haematoma (bilateral)
blood both sides
Bilateral septal swelling (vs one-sided DNS) → drain urgently
untreated → abscess, cartilage necrosis, saddle nose
A septal haematoma is a bilateral swelling of the septum (blood between the mucoperichondrium and cartilage), in contrast to the one-sided bulge of a deviated septum. It must be drained urgently, as it can strip the cartilage of its blood supply and progress to a septal abscess, cartilage necrosis and a saddle-nose deformity.
THE DANGER
A NOTE ON WHY IT IS AN EMERGENCY
A septal haematoma is emphasised as an emergency because of the threat to the septal cartilage and the risk of serious secondary infection. As with the auricular cartilage, the septal cartilage is avascular and depends on the overlying perichondrium for its nutrition; a haematoma that lifts the perichondrium away rapidly starves the cartilage, which can necrose within days, leading to collapse of the nasal bridge (a saddle deformity). Worse, the trapped blood is an ideal culture medium, so an untreated haematoma readily becomes a septal abscess, which not only destroys cartilage but, because the nose lies in the 'dangerous area of the face', can spread via valveless veins to cause cavernous sinus thrombosis. This combination of rapid cartilage loss and dangerous infection is why any bilateral septal swelling after nasal trauma must be drained without delay.
THE BOTTOM LINE
A septal haematoma is a bilateral septal swelling after trauma that must be drained urgently to prevent cartilage necrosis, a septal abscess and a saddle-nose deformity.
A practical corollary is that any patient who has had recent nasal trauma or septal surgery should have the septum specifically inspected for a haematoma, because the swelling can be missed if not looked for, and prompt recognition and drainage is far preferable to dealing with an established abscess or the permanent deformity that follows delay.
It is also worth appreciating that the same principle underlies the treatment of both septal and auricular haematomas: in each case a collection of blood is stripping avascular cartilage of its perichondrial blood supply, so the management — prompt evacuation and a dressing or packing that re-apposes the layers — follows the same logic and aims at the same goal of preventing cartilage death.
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DANGER / REMEMBER: The cartilage's blood supply comes from the perichondrium; a haematoma strips it off, causing cartilage necrosis, and if it becomes infected it forms a septal abscess (pain, fever, swelling) → cartilage destruction → a saddle-nose deformity, or it may spread (cavernous sinus thrombosis — the dangerous area of the face).
MANAGEMENT
Management is urgent incision and drainage (evacuation) with nasal packing/quilting and antibiotics, which prevents necrosis, abscess and saddle-nose. (It is distinguished from a deviated septum by being bilateral rather than one-sided.)
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KEY POINTS TO REMEMBER
Septal haematoma = blood between the mucoperichondrium and septal cartilage, usually after trauma/septal surgery.
Bilateral, smooth, soft/fluctuant septal swelling with nasal obstruction (vs the one-sided bulge of DNS).
Danger: strips the cartilage's blood supply → necrosis; if infected → septal abscess → cartilage destruction → saddle nose; may spread (cavernous sinus thrombosis).
SOURCES: Dhingra — Diseases of Ear, Nose and Throat.
THE CONCEPT
A septal perforation is a hole in the nasal septum (cartilaginous or bony).
CAUSES & FEATURES
Causes include trauma (septal surgery — the commonest — nose-picking, or cautery of both sides), cocaine abuse, chronic granulomatous disease (granulomatosis with polyangiitis, TB, syphilis, sarcoid), steroid nasal sprays, malignancy and a septal abscess. It is often asymptomatic, but anterior perforations cause whistling on breathing, crusting, epistaxis and obstruction, while posterior ones are usually silent.
INVESTIGATION & MANAGEMENT
The edge should be biopsied to exclude granulomatous disease or malignancy (with cANCA for GPA). Management is to treat the cause, use conservative measures (saline, moisturisers, crust removal) for symptoms, fit a silastic septal button (prosthesis) to close it, or attempt surgical repair (flaps — difficult) in symptomatic cases.
A NOTE ON THE IMPORTANCE OF FINDING THE CAUSE
The key clinical lesson with a septal perforation is that, although many are harmless, identifying the underlying cause is essential because some causes are serious. While the commonest cause is simply previous septal surgery or local trauma, a perforation can be the presenting sign of a systemic granulomatous disease such as granulomatosis with polyangiitis, of tuberculosis or syphilis, of cocaine abuse, or occasionally of a malignancy. This is why the edge of the perforation is biopsied and appropriate tests (such as cANCA for GPA) are done rather than simply attributing it to trauma. Treating the symptoms — crusting, whistling, bleeding — without investigating the cause risks missing a treatable systemic disease, so the perforation is regarded as a clue to be explained, not just a hole to be patched.
THE BOTTOM LINE
A septal perforation has many causes, some serious, so its edge is biopsied to exclude granulomatous disease or malignancy before treating the symptoms of whistling, crusting and bleeding.
A practical point in management is that many small, posterior or asymptomatic perforations need no active treatment beyond addressing the cause and keeping the nose moist, whereas larger anterior ones causing troublesome whistling and crusting may warrant a silastic septal button or surgical closure, so treatment is tailored to the symptoms rather than to the mere presence of the hole.
It is also worth noting that a septal perforation is one of the recognised complications of septal surgery itself, arising when tears occur in the mucoperichondrium on both sides at the same point, which is why careful, tissue-preserving technique during septoplasty and the avoidance of bilateral cautery for epistaxis are important preventive measures.
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KEY POINTS TO REMEMBER
Septal perforation = a hole in the nasal septum (cartilage/bone).
Often asymptomatic; anterior → whistling, crusting, epistaxis, obstruction; posterior usually silent.
Biopsy the edge (exclude granulomatous disease/malignancy; cANCA for GPA). Rx: treat cause, conservative care, silastic septal button, or surgical repair.
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SOURCES: Dhingra — Diseases of Ear, Nose and Throat.
THE CONCEPT
Nasal foreign bodies are common in children (beads, seeds, foam, button batteries) and the mentally challenged. A rhinolith is a calcified mass forming in the nasal cavity.
FEATURES
A NOTE ON THE TELL-TALE UNILATERAL DISCHARGE
The most useful clinical pearl in this area is that a unilateral, foul-smelling, often blood-stained nasal discharge in a child should be assumed to be a retained foreign body until proven otherwise. Children frequently insert objects into the nose without telling anyone, and the object may be forgotten until it causes a one-sided, offensive discharge — a presentation quite different from the bilateral clear discharge of a cold or allergy. Recognising this pattern prompts prompt examination and removal, and — crucially — flags the possibility of a button battery, which is a true emergency because it causes rapid tissue necrosis and can perforate the septum within hours. The same unilateral, foul discharge in an adult, by contrast, should raise the thought of a rhinolith or, importantly, a sinonasal tumour, again underlining that unilateral nasal symptoms deserve careful attention.
THE BOTTOM LINE
A unilateral foul, blood-stained nasal discharge in a child means a foreign body until proven otherwise, with a button battery an emergency, while a rhinolith causes similar symptoms in the long term.
A useful practical rule is that removal should be attempted only with good illumination, the right instrument and a cooperative patient, since blind or forceful attempts risk pushing the object further back (with a danger of aspiration) or injuring the mucosa; a frightened child or a difficult, impacted object is better managed under general anaesthesia.
It is also worth remembering that, in adults, a persistent unilateral nasal obstruction with foul or blood-stained discharge should never be assumed to be a simple foreign body or rhinolith but should prompt consideration of a sinonasal tumour, so examination, endoscopy and imaging are important to avoid missing a malignancy behind seemingly benign symptoms.
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DANGER / REMEMBER: A unilateral, foul-smelling, blood-stained nasal discharge in a child is a foreign body until proven otherwise, with obstruction; a button battery is an emergency (causing necrosis/septal perforation). A rhinolith is a calcified mass (calcium/magnesium phosphate/carbonate deposited around a long-standing foreign body or inspissated secretion) causing unilateral obstruction, foul discharge and epistaxis, felt as a hard, gritty mass and seen on X-ray/CT.
MANAGEMENT
Foreign bodies are removed under vision with an appropriate instrument (never pushed backward; general anaesthesia if the child is uncooperative); a button battery needs urgent removal, and a rhinolith is removed (sometimes piecemeal or under GA).
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KEY POINTS TO REMEMBER
Nasal foreign bodies: common in children (beads, seeds, button batteries — emergency); unilateral foul, blood-stained discharge in a child = FB until proven otherwise.
Rhinolith = calcified mass (around a long-standing FB/inspissated secretion) → unilateral obstruction, foul discharge, epistaxis; hard gritty mass on X-ray/CT.
Rx: remove under vision with the right instrument (don't push back; GA if uncooperative); rhinolith removal may need GA/piecemeal.
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SOURCES: Dhingra — Diseases of Ear, Nose and Throat.
THE CONCEPT
Atrophic rhinitis (ozaena) is a chronic nasal disease with progressive atrophy of the nasal mucosa, turbinates and bone, producing abnormally wide nasal cavities filled with foul-smelling crusts.
AETIOLOGY & FEATURES
It may be primary (idiopathic — associated with Klebsiella ozaenae, and nutritional/hormonal factors; typically young women, and commoner in certain regions) or secondary (post-surgical, post-radiation or granulomatous). Features are a paradoxical nasal obstruction (a wide cavity that feels blocked because of crusts), a foul smell that the patient cannot smell (a merciful anosmia — hence 'ozaena', as others notice the odour), epistaxis, crusting and abnormally wide cavities on examination.
MANAGEMENT
Management is nasal hygiene (alkaline/saline douching to remove crusts), glucose-glycerine drops (25% glucose in glycerine), topical/systemic antibiotics, and surgery to narrow the cavity (Young's operation — closure of the nostril — or submucosal implants).
A NOTE ON THE PARADOX AND THE NAME
Two features make atrophic rhinitis memorable and worth understanding: its paradoxical obstruction and its striking odour. The paradox is that although the nasal cavities become abnormally wide as the turbinates atrophy, the patient still complains of a blocked nose — because the wide, dry cavities fill with crusts that obstruct airflow and because the loss of normal mucosal sensation removes the feeling of a patent airway. The name 'ozaena' comes from the foul smell that emanates from the infected crusts; cruelly, the atrophy of the olfactory mucosa means the patient cannot smell it themselves (a 'merciful anosmia'), while everyone around them can, causing considerable social distress. Grasping these two paradoxes — a wide nose that feels blocked and a foul smell the sufferer cannot detect — captures the essence of the condition.
THE BOTTOM LINE
Atrophic rhinitis (ozaena) is progressive nasal atrophy giving paradoxically wide but crust-filled cavities and a foul odour the patient cannot smell, managed by douching, moisturising drops and cavity-narrowing surgery.
A practical point is that management is largely supportive and long-term, aimed at keeping the nose clean and moist and controlling the odour rather than achieving a cure, and that the various operations to narrow the nasal cavity are reserved for troublesome cases, reflecting how difficult this chronic condition can be to treat definitively.
It is also worth noting that atrophic rhinitis is far less common than it once was in developed regions, thought to reflect improvements in nutrition and living conditions, but that it remains an important and classic condition in parts of the world including India, where it continues to feature prominently in examinations and clinical practice.
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KEY POINTS TO REMEMBER
Atrophic rhinitis (ozaena) = progressive atrophy of nasal mucosa/turbinates/bone → abnormally wide cavities with foul crusts.
Primary (idiopathic; Klebsiella ozaenae, nutritional/hormonal; young women) or secondary (post-surgical/radiation/granulomatous).
Rx: nasal douching (remove crusts), 25% glucose in glycerine drops, antibiotics, surgery to narrow the cavity (Young's operation/implants).
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SOURCES: Dhingra — Diseases of Ear, Nose and Throat.
THE CONCEPT
Rhinosporidiosis is a chronic granulomatous infection caused by Rhinosporidium seeberi (an aquatic organism), acquired from stagnant pond water (bathing in ponds), and endemic in India and Sri Lanka.
FEATURES
It produces a friable, red, polypoidal, highly vascular mass studded with white dots (sporangia) — a classic 'strawberry' or mulberry appearance — usually in the nose/nasopharynx (also the conjunctiva). It bleeds easily and causes unilateral nasal obstruction and epistaxis.
DIAGNOSIS & MANAGEMENT
Diagnosis is clinical plus histology (sporangia containing spores). Management is wide surgical excision with cautery of the base (to reduce recurrence and seeding), with dapsone as an adjunct; recurrence is common.
A NOTE ON ITS DISTINCTIVE APPEARANCE AND RECURRENCE
Rhinosporidiosis is worth remembering for its highly characteristic appearance and its frustrating tendency to recur. The lesion's red, friable, vascular, polypoidal surface studded with tiny white sporangia gives the classic 'strawberry' look that, in the right epidemiological setting (someone who bathes in ponds in an endemic area such as India), is almost diagnostic; because it is so vascular, it bleeds readily, both spontaneously and during removal. The other key point is that simple excision is often followed by recurrence, because spores seeded at the base or nearby regrow — which is why treatment involves wide excision with cautery of the base to destroy residual organisms, and why dapsone is added and follow-up is important. These two features — the strawberry appearance and the recurrence — are the ones examiners most often want.
THE BOTTOM LINE
Rhinosporidiosis is a pond-water granulomatous infection producing a bleeding, strawberry-like nasal mass, treated by wide excision with cautery of the base to limit its common recurrence.
A practical caution is that, because the lesion is so vascular and bleeds readily, its removal should be planned with control of the base by cautery and preparedness for haemorrhage, and the diagnosis should be kept in mind in any patient from an endemic area presenting with a friable, bleeding nasal mass and a history of bathing in ponds.
It is also worth noting that rhinosporidiosis, despite its fungus-like appearance and behaviour, is caused by an organism (Rhinosporidium seeberi) now classified among aquatic protistan parasites rather than true fungi, which is one reason antifungal drugs are ineffective and why surgical excision, rather than medical therapy, remains the mainstay of treatment.
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KEY POINTS TO REMEMBER
Rhinosporidiosis = chronic granulomatous infection by Rhinosporidium seeberi, from stagnant pond water; endemic in India/Sri Lanka.
Friable, red, vascular, polypoidal mass studded with white sporangia — 'strawberry' appearance; nose/nasopharynx (also conjunctiva); bleeds easily.
Unilateral nasal obstruction and epistaxis; diagnosis clinical + histology (sporangia with spores).
Rx: wide surgical excision + cautery of the base (reduce recurrence/seeding), dapsone adjunct; recurrence common.
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SOURCES: Dhingra — Diseases of Ear, Nose and Throat.
THE CONCEPT
Functional endoscopic sinus surgery (FESS) is minimally invasive endoscopic surgery to restore the natural drainage and ventilation of the paranasal sinuses, mainly for chronic rhinosinusitis/nasal polyps refractory to medical treatment.
PRINCIPLE
Because the disease centres on the osteomeatal complex (OMC), FESS removes the obstruction/diseased tissue there (the uncinate process, ethmoid bulla, opening the maxillary/ethmoid/frontal/sphenoid sinuses as needed) to restore mucociliary drainage — 'functional' meaning it preserves mucosa and restores physiology (unlike older radical operations).
INDICATIONS & COMPLICATIONS
A NOTE ON THE PHILOSOPHY BEHIND 'FUNCTIONAL'
The word 'functional' in FESS captures a fundamental shift in the philosophy of sinus surgery that is worth understanding. Older sinus operations were radical — they stripped out the diseased sinus lining or created large artificial openings — on the assumption that removing the mucosa cured the disease. FESS is based on the opposite insight: that the mucosa is best preserved, and that most sinus disease stems from obstruction at the osteomeatal complex. So instead of stripping the sinuses, FESS precisely removes the small areas of obstruction at the OMC to re-establish the natural drainage and ventilation pathways, allowing the mucosa to recover its normal function. This 'functional', mucosa-sparing approach — restoring physiology rather than destroying tissue — is why FESS has largely replaced the older radical operations, and it mirrors the same conservative philosophy now seen throughout ENT surgery.
THE BOTTOM LINE
FESS is mucosa-sparing endoscopic surgery that relieves osteomeatal-complex obstruction to restore natural sinus drainage in medically-refractory chronic rhinosinusitis, with orbital and CSF-leak injury its main risks.
A practical point is that FESS demands a thorough knowledge of the anatomy of the lateral nasal wall and skull base and is guided by the pre-operative CT (and sometimes image-guidance navigation), precisely because the sinuses lie so close to the orbit and brain that the very complications it treats can also, if care is not taken, be caused by the surgery itself.
It is also worth appreciating that FESS has transformed the management of sinonasal disease and extended well beyond simple sinusitis, providing minimally invasive access for repairing CSF leaks, decompressing the orbit or optic nerve, removing selected tumours and managing complications, so that endoscopic sinus techniques now underpin a large part of modern rhinological surgery.
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DANGER / REMEMBER: Indications include CRS/polyps failing medical therapy, mucocele, fungal sinusitis, CSF-leak repair, orbital/optic decompression, tumour access and drainage of complications. Complications include bleeding, orbital injury (breaching the lamina papyracea → orbital haematoma/diplopia/blindness), a CSF leak (skull base/cribriform plate) and adhesions; it is done under endoscopic guidance ± navigation.
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KEY POINTS TO REMEMBER
FESS = minimally invasive endoscopic surgery restoring natural sinus drainage/ventilation; mainly for CRS/polyps failing medical treatment.
Principle: clear obstruction/disease at the osteomeatal complex (uncinate, ethmoid bulla, open sinuses) to restore mucociliary drainage; 'functional' = preserves mucosa.