Antrochoanal polyps are unilateral nasal polyps that originate from the maxillary sinus and extend into the choana, which is the space behind the nose where it connects to the throat. These polyps ...

Nasal polyps are fleshy swellings that develop in the lining of the nose and paranasal sinuses, which are the air-filled spaces linked to the nasal cavity. They are noncancerous growths.