Antrochoanal polyp (Killian's polyp) differs from ethmoidal nasal polyps in which key feature?
- A It is bilateral and eosinophilic in nature
- B It originates from the maxillary sinus, is unilateral, and does not recur after complete removal ✓
- C It is associated with aspirin-exacerbated respiratory disease
- D It has a higher malignant potential than ethmoidal polyps
Correct answer: B. It originates from the maxillary sinus, is unilateral, and does not recur after complete removal
Explanation
Antrochoanal polyp (Killian's polyp) originates from the maxillary sinus antrum, passes through the natural or accessory maxillary ostium, and extends to the choana — it is almost always unilateral. It is not associated with allergy, asthma, or aspirin sensitivity (unlike ethmoidal polyps) and has a low recurrence rate after complete endoscopic removal including the antral portion. Ethmoidal polyps are bilateral, eosinophilic, and strongly associated with allergy and Samter's triad.
Reference: Dhingra Diseases of Ear, Nose and Throat, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.