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EN4.{37-39,45} | Throat Pharynx and Oesophagus — Graded Quiz
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Which of the following clinical features is MOST characteristic of peritonsillar abscess (quinsy) that distinguishes it from severe acute tonsillitis?
Correct. Quinsy is distinguished from simple acute tonsillitis by the combination of uvular deviation to the contralateral side (from unilateral peritonsillar pus collection) and trismus (restricted mouth opening due to pterygoid spasm). Fever and cervical lymphadenopathy occur in both conditions.
Peritonsillar abscess (quinsy): unilateral peritonsillar bulging → uvular deviation to OPPOSITE side + trismus (pterygoid spasm) + hot-potato voice. These features are absent in acute tonsillitis alone.
Bilateral tonsillar enlargement with exudate is seen in uncomplicated acute tonsillitis. High fever and cervical lymphadenopathy occur in both quinsy and acute tonsillitis — they are not distinguishing features. The defining features of quinsy are unilateral peritonsillar bulging, uvular deviation contralaterally, and trismus.
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According to the Paradise criteria for tonsillectomy, which of the following frequency thresholds qualifies for surgery?
Correct. ≥7 documented episodes in the preceding 12 months is one of the three qualifying thresholds under the Paradise criteria. The other two are ≥5/year for 2 consecutive years and ≥3/year for 3 consecutive years.
Paradise criteria: ≥7/year × 1 year; OR ≥5/year × 2 consecutive years; OR ≥3/year × 3 consecutive years — each episode must be physician-documented and meet at least one clinical criterion.
4 per year for 2 years does not meet the Paradise threshold (requires ≥5/year for 2 years). 3 episodes over 3 years = 1/year — well below threshold. 2 episodes in one year is far below the minimum requirement.
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Post-tonsillectomy haemorrhage occurring on day 8 after surgery is classified as which type and is caused by which mechanism?
Correct. Day 8 post-tonsillectomy haemorrhage = secondary haemorrhage, caused by infection of the fibrinous eschar covering the tonsil bed. As the infected eschar sloughs off, it exposes the underlying vessels. This is the most dangerous delayed complication and requires emergency admission.
Post-tonsillectomy haemorrhage: Primary (<24h) = intraoperative vessel slippage; Reactionary (24h-few days) = clot detachment; Secondary (Day 5-10) = infection causing eschar sloughing. Secondary is the most dangerous delayed complication — requires hospital admission, IV antibiotics, and possible return to theatre.
Primary haemorrhage occurs within 24 hours of surgery. Reactionary haemorrhage occurs in the first few post-operative days from clot disturbance. Suture dehiscence is not the typical mechanism — most tonsillectomies use diathermy or cold dissection without sutures.
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The single most clinically important distinction in the differential diagnosis of dysphagia is between solid-only dysphagia and dysphagia to both solids and liquids from onset. This distinction indicates respectively:
Correct. Solid-only dysphagia indicates a mechanical obstruction narrowing the lumen — liquids still pass around the obstruction. Dysphagia to both solids and liquids simultaneously indicates a motility disorder (e.g., achalasia) where propulsive peristalsis is absent. This distinction directs the next investigation: endoscopy/barium for obstruction; manometry for motility.
Solid-only dysphagia = luminal obstruction (stricture, carcinoma, ring/web) — fluids can still pass around the obstruction. Both solids and liquids from onset = neuromuscular/motility disorder (achalasia, diffuse oesophageal spasm) — the muscle cannot generate peristalsis regardless of food consistency.
The oropharyngeal vs oesophageal distinction is made on whether initiation of swallowing is impaired (oropharyngeal) or post-initiation transport fails (oesophageal). Both benign and malignant causes can produce solid-food dysphagia. The solid vs liquid distinction does not localise between oesophagus and stomach.
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Which investigation is the first-choice modality for a patient with suspected Zenker's diverticulum (pharyngeal pouch)?
Correct. Barium swallow (barium meal) is the first investigation of choice for Zenker's diverticulum — it clearly demonstrates the pulsion pouch arising at Killian's dehiscence (between thyropharyngeus and cricopharyngeus). Endoscopy is potentially dangerous because the scope can enter and perforate the pouch.
Barium swallow is the investigation of choice for Zenker's diverticulum — it clearly outlines the pharyngeal pouch at Killian's dehiscence. Endoscopy is RISKY (risk of inadvertently entering and perforating the pouch). Manometry assesses motility disorders, not structural pouches.
Upper GI endoscopy risks entering and perforating the diverticulum — it should be deferred until the anatomy is known. CT is used for complications or staging but is not the primary diagnostic test. Manometry is for motility disorders — not structural pouches.
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The two major subtypes of oesophageal carcinoma (squamous cell carcinoma vs adenocarcinoma) differ in their typical anatomical location. Which statement CORRECTLY matches the subtype to its location?
Correct. Squamous cell carcinoma of the oesophagus predominantly involves the upper and middle thirds of the oesophagus — associated with tobacco, alcohol, hot beverages, and nutritional deficiency. Adenocarcinoma arises in the lower third from columnar metaplasia (Barrett's oesophagus) due to chronic gastro-oesophageal reflux disease.
Oesophageal SCC: upper and middle thirds (associated with alcohol, tobacco, hot beverages, nutritional deficiency, achalasia, Plummer-Vinson syndrome). Oesophageal adenocarcinoma: lower third, arising from Barrett's oesophagus in the context of chronic GORD. This anatomical distinction has important staging and surgical implications.
SCC does not primarily occur in the lower third — that is adenocarcinoma territory. Post-cricoid SCC (Plummer-Vinson) is a specific variant but not the only site of SCC. Both subtypes do not have equal distribution across levels — their sites are distinctly different.
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A surgeon is counselling parents before their child's tonsillectomy. Which of the following post-operative instructions is MOST important for preventing secondary haemorrhage?
Correct. The key counselling points to reduce secondary haemorrhage risk are: (1) soft/liquid diet for 2 weeks to avoid mechanical trauma to the fibrinous eschar; (2) complete the prescribed antibiotic course to reduce infection; (3) return IMMEDIATELY to hospital if any bleeding occurs — secondary haemorrhage can escalate rapidly. Active gargling is contraindicated as it risks dislodging the eschar.
Secondary haemorrhage (Day 5–10) is caused by infection and eschar sloughing. Preventive post-operative counselling includes: soft/liquid diet for 2 weeks (to avoid mechanical disruption of the eschar), completing antibiotics to suppress tonsillar bed infection, and returning immediately at any sign of bleeding. Gargling can dislodge the eschar — it is contraindicated.
Maintaining upright posture is not a specific preventive measure for secondary haemorrhage. Ice packs address early pain and swelling, not the infection-driven secondary bleed. Gargling risks dislodging the fibrinous eschar and is contraindicated post-tonsillectomy.
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Which investigation is MOST appropriate as the first step in a patient with progressive solid-food dysphagia and a clinical suspicion of oesophageal malignancy?
Correct. Upper GI endoscopy with biopsy is the first-line investigation for suspected oesophageal carcinoma. It simultaneously visualises the lesion and obtains tissue for definitive histological diagnosis. Staging investigations (CT, PET) follow once the diagnosis is histologically confirmed.
Upper GI endoscopy with biopsy is the investigation of choice for suspected oesophageal malignancy — it directly visualises the lesion AND provides tissue for histological diagnosis. Barium swallow is useful but cannot provide tissue diagnosis. CT staging follows once histology is confirmed. Manometry is for motility disorders — not structural lesions.
Manometry evaluates motility disorders — not structural/malignant lesions. CT scan alone cannot provide tissue diagnosis — endoscopy with biopsy must precede CT staging. Barium swallow provides structural anatomy but cannot yield histology.
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A 19-year-old presents with sore throat and bilateral tonsillar enlargement with a greyish-white membrane. He has posterior cervical lymphadenopathy, hepatomegaly, and marked malaise. Monospot test is positive. The management principle that MUST be avoided is:
Correct. Amoxicillin (and ampicillin) must be avoided in EBV infectious mononucleosis. Administration causes a florid maculopapular rash in up to 80–90% of patients — an immune-mediated reaction, not a true penicillin allergy. This is one of the most important clinical traps in tonsillitis management. Management of EBV mononucleosis is supportive: analgesics, rest, hydration, and steroids only if indicated.
EBV infectious mononucleosis: amoxicillin/ampicillin administration causes a widespread maculopapular rash in up to 80–90% of patients — a classic clinical trap. Management is supportive. Steroids are used for airway compromise or severe thrombocytopenia. Avoid contact sports (spleen rupture risk).
Analgesics are appropriate symptomatic management. Bed rest and hydration are standard supportive measures. Steroids have a role in airway compromise from massively enlarged tonsils or in severe thrombocytopenia — these are appropriate. The contraindicated intervention is amoxicillin.
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Achalasia cardia is a primary motility disorder of the oesophagus. Which of the following BEST describes its pathophysiology?
Correct. Achalasia results from degeneration of inhibitory ganglion cells (producing nitric oxide and VIP) in the myenteric plexus. This causes: (1) the lower oesophageal sphincter (LOS) fails to relax with swallowing, and (2) the body of the oesophagus shows absent peristalsis. The result is a functional obstruction at the GEJ with proximal oesophageal dilatation.
Achalasia pathophysiology: degeneration of ganglion cells (especially inhibitory NO/VIP neurons) in the Auerbach (myenteric) plexus → (1) failure of LOS relaxation on swallowing + (2) aperistalsis of the oesophageal body. Consequence: food stagnation, oesophageal dilatation, regurgitation of undigested food. Barium shows rat-tail/bird-beak tapering at the GEJ.
Parietal cell loss causes achlorhydria — not oesophageal dysmotility. A Schatzki ring is a mechanical mucosal ring at the GEJ causing intermittent solid-food dysphagia — it is structural, not a motility disorder. GORD does not cause achalasia — they are distinct entities; achalasia is a primary disorder of neural degeneration.
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