You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is 15.Antrochoanal polyp is characterized by: and explain in detail?
C and D Nasal polyos are non neoplastic mases of edematous nasal or sinus mucosa.They do not bleed on touch. Recurrence is uncommon in case of antrochoanal polyp Antrochoanalpolyps arise from maxillary antrum and then grow into choana and nasal cavity Ref Dhingra 6/e p 174,175