title: [Observe the origin of antrochoanal polyp and the comparison of the curative effect of antrochoanal polyp].
abstract: OBJECTIVE
  To explore the curative effect and origin of antrochoanal polyp (ACP) with various approaches.
  
  
  METHODS
  Fifty-seven patients with ACP were included in the study. All the ACP patients were examined by preoperative endoscopy and computer tomographic (CT) scans. The patients were treated by various endoscopic approaches including endoscopic middle meatus antrostomy, inferior meatus antrostomy combined with endoscopic middle meatus antrostomy or endoscopic medial maxillectomy combined with endoscopic middle meatus antrostomy respectively. The relationship between polyp location in middle meatus and lesions in the antrum was explored during the surgery. Pathological examination was carried out and patients were regularly followed up after operation.
  
  
  RESULTS
  Fifty-seven ACP develops from antral cyst. In 22 cases of endoscopic middle meatus antrostomy, two patients relapsed. In 17 cases of inferior meatus antrostomy combined with endoscopic middle meatus antrostomy, one patients relapsed. In 18 cases of endoscopic medial maxillectomy combined with endoscopic middle meatus antrostomy, no one relapsed.
  
  
  CONCLUSIONS
  Our data indicated that the ACP mainly originates in antral cyst, and capsule wall herniates to middle meatus through the antral ostium. ACP are common in unilateral, rare in both sides. The endoscopic approaches of middle meatus antrostomy and inferior meatus antrostomy combined with endoscopic middle meatus antrostomy might guarantee good prognosis. If the cyst is on the anterior wall of maxillary sinus, the approach of endoscopic medial maxillectomy can obtain a better vision and completely remove the lesions.
authors.forename: Wenwen
authors.initials: W
authors.lastname: Zheng
authors.forename: Guoqin
authors.initials: G
authors.lastname: Hu
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.forename: Shimin
authors.initials: S
authors.lastname: Liu
authors.forename: Qin
authors.initials: Q
authors.lastname: Wang
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Sun
authors.forename: Hujun
authors.initials: H
authors.lastname: Zhou
mesh_terms: D003560:Cysts / Q000601:surgery; D004724:Endoscopy; D006801:Humans; D008443:Maxillary Sinus / Q000601:surgery; D009298:Nasal Polyps / Q000601:surgery*; D059747:Nasal Surgical Procedures / Q000379:methods*; D014057:Tomography, X-Ray Computed