title: Primary extraosseous cemento-ossifying fibroma of the auricle.
abstract: BACKGROUND
  A mass of the auricle is uncommon. An enlarging lesion may be the result of a reactive process, or a benign or malignant neoplasm. The literature is reviewed, and a case of extraosseous cemento-ossifying fibroma of the auricle is presented.
  
  
  METHODS
  A 22-year-old white man presented with a 3-month history of an enlarging 2 cm mass in the right concha cavum. An incisional biopsy demonstrated cemento-ossifying fibroma. The lesion was resected en bloc, and the patient did well. There is no evidence of recurrence.
  
  
  RESULTS
  Pathological examination of the excised mass revealed a well-circumscribed but unencapsulated spindle cell lesion with foci of osteoid and cementum deposition. It did not involve the auricular cartilage, and there was no connection with the overlying epidermis.
  
  
  CONCLUSIONS
  This is a case report of an extraosseous cemento-ossifying fibroma of the auricle. This benign tumor should be completely excised because local recurrence may otherwise result.
authors.affiliation: Temple University Hospital, Philadelphia, PA 19140, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Kaufmann
authors.forename: R F
authors.initials: RF
authors.lastname: Padmore
authors.forename: J A
authors.initials: JA
authors.lastname: Ridge
authors.forename: C D
authors.initials: CD
authors.lastname: Friedman
mesh_terms: D000328:Adult; D001706:Biopsy; D002467:Cell Nucleus / Q000648:ultrastructure; D003937:Diagnosis, Differential; D004428:Ear Neoplasms / Q000473:pathology*; D004431:Ear, External / Q000473:pathology*; D018214:Fibroma, Ossifying / Q000473:pathology*; D006801:Humans; D008297:Male; D008938:Mitosis; D010006:Osteoblasts / Q000473:pathology; D014746:Vimentin / Q000032:analysis
chemical_list: D014746:Vimentin