title: Mastoid osteomas: report of two cases.
abstract: OBJECTIVE
  To discuss the differential diagnosis of two cases with mastoid mass.
  
  
  METHODS
  Case report and review of the literature.
  
  
  METHODS
  The study was carried out in Gulhane Military Medical Academy, Haydarpasa Training Hospital, Istanbul, Turkey.
  
  
  RESULTS
  Both cases were 23-year-old males. They admitted to our clinic with masses behind their left ears that had been progressively enlarging for 5 years. In both cases, coronal and axial computerized tomography scans revealed a wide-based lesion involving temporal bone cortex. The cases were operated on for diagnosis and for correction of the cosmetic deformity. Histopathological examinations were consistent with mixed and spongiotic osteoma.
  
  
  CONCLUSIONS
  Mastoid osteoma is a rare, benign tumor of bone. It may cause cosmetic deformity such as external mass or an auricular protrusion. Other neoplasms of the mastoid region, such as osteosarcoma and osteoblastic metastasis, should be considered for the differential diagnosis.
authors.affiliation: Gulhane Military Medical Academy, Haydarpasa Training Hospital, Department of ENT, Istanbul, Turkey. atilagungor@superonline.com
authors.forename: Atila
authors.initials: A
authors.lastname: Güngör
authors.forename: Hakan
authors.initials: H
authors.lastname: Cincik
authors.forename: Ethem
authors.initials: E
authors.lastname: Poyrazoglu
authors.forename: Omer
authors.initials: O
authors.lastname: Saglam
authors.forename: Hasan
authors.initials: H
authors.lastname: Candan
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008416:Mastoid / Q000601:surgery*; D010016:Osteoma / Q000175:diagnosis* / Q000601:surgery; D012888:Skull Neoplasms / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed