ENT Polyp 2f31c612 Antrochoanal polyp arise from? A Ethmoid sinus B Maxillary sinus C Frontal sinus D Sphenoid sinus High-Yield Explanation ANSWER: (B) Maxillary sinusREF: Dhingras ENT 5th ed p-188, 4th edition page 164See table of "DIFFERENCES BETWEEN ANTROCHOANAL AND ETHMOIDAL POLYP" in ENT December 2009