The antrochoanal polyps or solitary Killian polyps are seldom benign pathologies. Since 1990 to October 2002 we have registered a total of 30 patients with these diagnosis (20 male and 10 female) between 5 and 70 years old. The nasal obstruction, usually unilateral, has been constant in all of them and in more than a 63% they referred it since more than one year. They underwent surgery with Functional Endoscopic Endonasal Surgery. The postoperative results have been satisfactory except in two patients who have had a recidive with another surgery. We analyse also a bibliography revision on this pathology.