title: [Evaluation of clinical features of antrochoanal polyps].
abstract: Current knowledge on the prevalence and clinical features of antrochoanal polyps (ACPs), benign lesions arising in the maxillary sinus and extending into the choana, is very limited in Japan. We prospectively evaluated prevalence and clinical features in 15 subjects with ACPs from among 728 undergoing endoscopic endonasal sinus surgery between April 2007 and March 2008, and prospectively enrolled in this study. The 15 subjects, who accounted for 2.1% of the total, had nasal obstruction, rhinorrhea, and postnasal drip. Symptoms significantly reduced postoperatively. Maxillary-sinus-origin ACP distribution was 40% from the maxillary sinus floor to the posterior wall, 26.7% from maxillary sinus floor, and 20% from the maxillary sinus floor to the internal wall. Postoperative recurrence was 13.3%. Endoscopic endonasal sinus surgery for ACPs was most effective for polyp is originating in the maxillary sinus determined carefully and excised as completely as possible, followed by appropriate postoperative treatment.
authors.affiliation: Department of Otorhinolaryngology, Jikei University School of Medicine, Tokyo.
authors.forename: Daiya
authors.initials: D
authors.lastname: Asaka
authors.forename: Mamoru
authors.initials: M
authors.lastname: Yoshikawa
authors.forename: Tsuguhisa
authors.initials: T
authors.lastname: Nakayama
authors.forename: Takuto
authors.initials: T
authors.lastname: Yoshida
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Yoshimura
authors.forename: Jiro
authors.initials: J
authors.lastname: Iimura
authors.forename: Tetsushi
authors.initials: T
authors.lastname: Okushi
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Matsuwaki
authors.forename: Makoto
authors.initials: M
authors.lastname: Iida
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Yanagi
authors.forename: Nobuyoshi
authors.initials: N
authors.lastname: Otori
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Moriyama
mesh_terms: D000293:Adolescent; D000328:Adult; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008443:Maxillary Sinus; D008875:Middle Aged; D009298:Nasal Polyps / Q000601:surgery; D009305:Nasopharynx; D011446:Prospective Studies