title: Basal cell adenoma of the parotid gland: clinical and pathological findings in 29 cases.
abstract: OBJECTIVE
  To determine the clinical and pathological features of basal cell adenoma (BCA) of the parotid gland.
  
  
  METHODS
  This is a retrospective study of 29 parotid BCAs in 28 patients who underwent surgery at the Department of Otolaryngology Head and Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, between October 2000 and June 2013. The tumors were categorized according to their location in the parotid gland as superior superficial lobe, inferior superficial lobe and deep lobe.
  
  
  RESULTS
  The mean age was 57.0 years (range, 32-83 years). The clinical manifestations of parotid BCAs were consistent with those of other benign parotid tumors. There were no significant differences in age, average disease duration and tumor size among the three tumor groups. There were 11 deep tumors (11/29, 37.9%), and five of them exhibited cystic degeneration (5/11, 45.5%). A total of 15 patients underwent FNAB examination, and the results were positive in seven patients (7/15, 46.7%). Mild facial nerve function impairment occurred in five patients (House-Brackmann grade II), of whom, three had recovered by the 6-month follow-up. No cases of local recurrence or malignant transformation were observed during follow-up.
  
  
  CONCLUSIONS
  The clinical features of BCA are consistent with those of other benign tumors. The deep lobe of the parotid gland is more likely to develop BCAs, and thus, this diagnosis should be considered in patients with deep-lobe tumors, especially when accompanied with cystic degeneration. FNAB can increase the rate of preoperative diagnoses.
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine Shanghai 200092, China ; Ear Institute, Shanghai Jiaotong University School of Medicine Shanghai 200092, China.
authors.forename: Jingrong
authors.initials: J
authors.lastname: Lu
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine Shanghai 200092, China ; Ear Institute, Shanghai Jiaotong University School of Medicine Shanghai 200092, China.
authors.forename: Weiwen
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine Shanghai 200092, China ; Ear Institute, Shanghai Jiaotong University School of Medicine Shanghai 200092, China.
authors.forename: Zhentao
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine Shanghai 200092, China ; Ear Institute, Shanghai Jiaotong University School of Medicine Shanghai 200092, China.
authors.forename: Huan
authors.initials: H
authors.lastname: Jia
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine Shanghai 200092, China ; Ear Institute, Shanghai Jiaotong University School of Medicine Shanghai 200092, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine Shanghai 200092, China ; Ear Institute, Shanghai Jiaotong University School of Medicine Shanghai 200092, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Wu
authors.affiliation: Department of Otolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine Shanghai 200092, China ; Ear Institute, Shanghai Jiaotong University School of Medicine Shanghai 200092, China.
authors.forename: Mingliang
authors.initials: M
authors.lastname: Xiang
mesh_terms: D000236:Adenoma / Q000473:pathology*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044963:Biopsy, Fine-Needle; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010307:Parotid Neoplasms / Q000473:pathology*; D012189:Retrospective Studies
keywords: Basal cell adenoma; benign parotid tumor