title: [Adenoid cystic carcinoma of external auditory canal: 8 cases report].
abstract: OBJECTIVE
  To observe the clinical and pathological features of adenoid cystic carcinoma(ACC) of external auditory canal (EAC, and analyze the possible factors related to prognosis.
  
  
  METHODS
  One out of 8 patients with ACC of EAC underwent tumor open biopsy. 5 patients underwent the extensive tumor resection, and 2 patients underwent the modified lateral temporal bone resection (1 of the 2 subjoined a total parotidectomy). Five patients received the postoperative radiotherapy.
  
  
  RESULTS
  The time of follow up was 5-97 months. Two patients were loss to follow-up, 5 patients with disease free survival, and 1 patient survival with tumor.
  
  
  CONCLUSIONS
  In this study, ACC of EAC is more often observed in female. The most common clinical manifestations are otalgia and neoplasm which grows slowly. The disease has high misdiagnosis rate. Surgical treatment is effective for it.
authors.forename: Shengjuan
authors.initials: S
authors.lastname: Zhen
authors.forename: Tao
authors.initials: T
authors.lastname: Fu
authors.forename: Jinjie
authors.initials: J
authors.lastname: Qi
authors.forename: Junfeng
authors.initials: J
authors.lastname: Wen
mesh_terms: D001706:Biopsy; D003528:Carcinoma, Adenoid Cystic / Q000473:pathology / Q000628:therapy*; D003951:Diagnostic Errors; D018572:Disease-Free Survival; D004424:Ear Canal; D004428:Ear Neoplasms / Q000473:pathology / Q000628:therapy*; D005260:Female; D006801:Humans; D008297:Male; D011379:Prognosis; D012189:Retrospective Studies