EN4.{30,35-36,46} | Head Neck and Systemic ENT — Practice Quiz

Correct. Haemotympanum, bloody otorrhoea, and Battle's sign are the classic triad of longitudinal temporal bone fracture — the most common type (~80%), running parallel to the external auditory canal. These patients have conductive hearing loss; facial nerve involvement is less common (~20%) than in transverse fractures.

Longitudinal temporal bone fracture (80% of temporal bone fractures): runs parallel to the long axis of the petrous bone; classically causes haemotympanum, bloody otorrhoea, Battle's sign, and conductive hearing loss. Facial nerve injury in ~20%. Transverse fracture (20%) runs perpendicular, causes SNHL, vertigo, and higher rate of facial nerve palsy (~50%) but usually does NOT cause bloody otorrhoea.

Transverse temporal bone fractures cross the inner ear, causing sensorineural hearing loss and vertigo — they typically do not produce haemotympanum or bloody otorrhoea. Mixed fractures have features of both. A petrous apex fracture without tympanic involvement would not cause haemotympanum or bloody otorrhoea.

Correct. In the traditional zone-based approach, Zone II penetrating neck injuries (between cricoid cartilage and angle of mandible) mandate surgical exploration because the zone is directly accessible and a missed carotid, jugular, or aerodigestive injury carries a very high mortality. Zones I and III are explored selectively due to difficult surgical access.

Traditional zone-based management: Zone I (below cricoid) and Zone III (above angle of mandible) — selective exploration with angiography/endoscopy due to surgical access difficulty. Zone II (cricoid to angle of mandible) — MANDATORY surgical exploration in the traditional approach because the structures are directly accessible and the consequences of a missed vascular or aerodigestive injury are catastrophic. Modern 'no-zone' approach with CT angiography is gaining acceptance.

Zone I injuries (below cricoid) and Zone III injuries (above angle of mandible) are managed selectively — angiography, bronchoscopy, and oesophagoscopy guide decision-making because the anatomy makes direct exploration technically demanding. Not all zones require mandatory exploration under the traditional approach.

Correct. The classic presentation — painful parotid swelling worsening at mealtimes (intermittent obstruction or stimulated secretion) plus cystic ultrasound appearance and FNAC showing mucoid fluid with foamy macrophages — is consistent with a parotid retention cyst. These arise from ductal obstruction and mucous accumulation.

The combination of meal-related swelling (sialectasis from intermittent obstruction), posterior acoustic enhancement on ultrasound (cystic lesion), and FNAC showing mucoid material with foamy macrophages is characteristic of a salivary gland retention cyst. Pleomorphic adenoma is solid; Warthin's tumour has characteristic lymphoid stroma and bilaterality; calculus would show echogenic focus with acoustic shadowing; mucoepidermoid carcinoma FNAC would show mucus cells + epidermoid cells + intermediate cells without the simple foamy macrophage picture.

Pleomorphic adenoma is solid with heterogeneous echogenicity; FNAC shows chondromyxoid stroma + epithelial and myoepithelial cells. Warthin's tumour shows lymphoid stroma and is often bilateral. A calculus would show an echogenic calcific focus with acoustic shadowing, not posterior acoustic enhancement. Mucoepidermoid carcinoma FNAC shows mucus cells, epidermoid cells and intermediate cells.

Correct. Ludwig's angina is the classic diagnosis: bilateral, board-like (non-fluctuant) submandibular swelling + floor of mouth elevation (tongue pushed up) + trismus + drooling + toxaemia, classically in a poorly controlled diabetic. Airway security is the immediate priority.

Ludwig's angina: bilateral cellulitis/abscess of submandibular, sublingual, and submental spaces. Classic features: bilateral brawny (woody, board-like, non-fluctuant) submandibular swelling + sublingual oedema (tongue elevation) + trismus + dysphagia + drooling. Airway emergency — secure airway BEFORE the patient deteriorates. Typically follows dental infection (mandibular molar) in a diabetic or immunosuppressed patient.

Submandibular lymphadenitis is usually unilateral and soft/fluctuant. Peritonsillar abscess presents with unilateral peritonsillar bulge and deviation of uvula. Parapharyngeal abscess causes oropharyngeal bulge but usually unilateral and parapharyngeal in location — NOT bilateral floor of mouth involvement.

Correct. The retropharyngeal space extends from the skull base down to the posterior mediastinum (approximately T4). Infection here can track downward as descending necrotising mediastinitis, carrying a mortality of 20-40% even with aggressive treatment. This is why CT with contrast is mandatory — to delineate extent of spread.

The retropharyngeal space (also called the 'danger space' in some classifications) extends from the skull base down through the posterior mediastinum to the diaphragm (T4 level). Infection can descend as descending necrotising mediastinitis — a rapidly fatal complication. The parapharyngeal space communicates with adjacent spaces but descends less directly. The masticator space does not communicate with the mediastinum.

The parapharyngeal space communicates with adjacent deep neck spaces but does not extend directly into the posterior mediastinum. The submandibular space is the floor-of-mouth space that communicates with the parapharyngeal space. The masticator space contains the muscles of mastication and does not communicate with the mediastinum.

Correct. The danger space lies between the alar fascia (anterior wall) and the prevertebral fascia (posterior wall), running from the skull base to the diaphragm. This explains how an oropharyngeal infection can rapidly cause descending necrotising mediastinitis without surgical barriers to stop its progression.

The danger space (space 4, Grodinsky and Holyoke classification) lies between the alar fascia (anteriorly) and the prevertebral fascia (posteriorly), extending from the skull base to the diaphragm (T12). It is 'dangerous' because it allows rapid spread of infection to the posterior mediastinum. Distinguish from the retropharyngeal space (between the buccopharyngeal fascia and alar fascia).

The space between the prevertebral fascia and vertebral bodies is the prevertebral space. The retropharyngeal space lies between the buccopharyngeal (visceral) fascia and the alar fascia. The pretracheal space lies anterior to the trachea and is enclosed within the pretracheal fascia.

Correct. Oral hairy leukoplakia (OHL) is an EBV-driven condition virtually pathognomonic of significant HIV immunosuppression. Its classic site is the lateral border of the tongue; the corrugated, non-removable white plaque in an HIV patient with a CD4 count of 60 is a textbook presentation.

Oral hairy leukoplakia (OHL): EBV-driven, pathognomonic of severe immunosuppression (CD4 <200), corrugated/hairy white plaque on LATERAL border of tongue, cannot be wiped off, painless. Oral candidiasis: pseudomembranous — white patches that CAN be wiped off; erythematous candidiasis is red. Lichen planus: reticular pattern, bilateral buccal mucosa, may cause erosions. Tobacco leukoplakia: dorsum of tongue or buccal mucosa, not lateral border in the characteristic corrugated form.

Oral candidiasis (pseudomembranous type) produces white patches that CAN be wiped off with gauze, leaving an erythematous base. Tobacco leukoplakia does not specifically favour the lateral tongue border in the corrugated pattern and is not associated with HIV immunosuppression. Lichen planus shows a reticular (Wickham's striae) pattern, is usually bilateral on buccal mucosa, and can be erosive/painful.

Correct. Kaposi's sarcoma is caused by HHV-8 (KSHV), is an AIDS-defining illness, and typically occurs with severe immunosuppression (CD4 <200). In the ENT region, it commonly presents as violaceous (purple-red) lesions on the hard palate, gingiva, or soft palate.

Kaposi's sarcoma: HHV-8 driven; AIDS-defining condition (CD4 typically <200); oral KS presents as violaceous/purple-red lesions on the HARD PALATE (most common oral site), gingiva, or tongue — NOT white patches. ART is the cornerstone of KS management (immune reconstitution allows regression); systemic chemotherapy for advanced/visceral KS.

Oral KS is a late manifestation of HIV, appearing with severe immunosuppression (CD4 <200) — not when CD4 is above 500. Oral KS presents as violet/purple-red lesions — NOT white patches. ART is the primary treatment for KS, often causing regression by restoring immune function.

Correct. The standard management of a suspected benign parotid neoplasm (most likely pleomorphic adenoma) is superficial parotidectomy with facial nerve identification and preservation. Incisional biopsy is absolutely contraindicated — it risks tumour seeding, recurrence, and facial nerve injury, and renders subsequent definitive surgery more difficult.

Parotid surgery cardinal rules: (1) NEVER incisional biopsy of a parotid mass (risks facial nerve injury, tumour seeding, and making a subsequent proper dissection impossible — a non-negotiable safety rule). (2) Surgical standard for a parotid mass suspected to be pleomorphic adenoma = superficial or total conservative parotidectomy WITH meticulous facial nerve identification and preservation. FNAC is acceptable pre-op for diagnosis but does not replace surgery for a growing solid parotid mass.

Incisional biopsy is absolutely contraindicated for parotid masses — it can seed tumour and damage the facial nerve. Observation after FNAC is inappropriate for a solid, growing parotid mass. Elective neck dissection is not indicated for a clinically and radiologically node-negative well-encapsulated lesion.

Correct. Pneumocystis jirovecii otitis media is a classic HIV-associated aural condition presenting with chronic otorrhoea and aural granulation tissue unresponsive to antibiotics. Biopsy is required to confirm the diagnosis. It is important to suspect opportunistic organisms in HIV-positive patients with atypical or treatment-resistant ENT infections.

Pneumocystis jirovecii (PCP) can cause aural Pneumocystis disease — an unusual but classical HIV-associated otological manifestation. It presents as chronic otorrhoea with aural polyps or granulation tissue unresponsive to standard antibiotic therapy. The diagnosis requires high suspicion and biopsy showing PCP organisms. Aspergillus otomycosis is common in immunocompromised patients but classically appears as fungal debris (white/black). CMV causes sensorineural hearing loss via cochlear nerve involvement — not granulation tissue.

Candida otitis is possible in HIV but typically presents as creamy white discharge rather than granulation tissue. Aspergillus otomycosis presents with characteristic black/yellow spores and fungal debris. CMV causes sensorineural hearing loss via the cochlea/auditory nerve — not chronic otorrhoea with granulation.