[Choanal polyps: principles of current diagnosis and treatment]

Computed tomography, endoscopic investigation, surgical endoscopic revision of the paranasal sinuses performed in 20 patients with choanal polyps (CP) showed that according to their growth origin, CP may be antrochoanal, sphenochoanal and ethmochoanal (11, 3 and 6 patients, respectively). Thorough preoperative examination prevents opening of unaffected paranasal sinuses. However, when several sinuses are involved, site of CP fixation may be detected at surgery. Endoscopic techniques presented as a good alternative to routine polypotomy and Caldwell-Luc operation. In atypical CP location a differential diagnosis with inverted papilloma must be made.