Antrochoanal polyp (Killian's polyp) differs from ethmoidal polyps in several ways. Which statement best characterises an antrochoanal polyp?
- A Unilateral, single, arising from maxillary sinus with a cystic component extending through the accessory ostium into the nasopharynx, not allergy-related ✓
- B Bilateral, multiple, arising from ethmoid sinuses, associated with allergy and asthma
- C Bilateral with cystic degeneration, arising from the middle turbinate
- D Associated with Samter's triad (aspirin sensitivity, asthma, nasal polyps)
Correct answer: A. Unilateral, single, arising from maxillary sinus with a cystic component extending through the accessory ostium into the nasopharynx, not allergy-related
Explanation
Antrochoanal (Killian's) polyps are unilateral, single polyps arising within the maxillary sinus, with the cystic portion in the antrum and a fleshy portion extending through the accessory maxillary ostium into the middle meatus and then into the nasopharynx. They are not associated with allergy or Samter's triad. They are more common in children/young adults and require endoscopic excision of both the nasal and intrasinus portions to prevent recurrence. Ethmoidal polyps are bilateral, multiple, 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.