title: [Ossifying fibroma of the temporal bone].
abstract: OBJECTIVE
  To describe the clinical presentation of ossifying fibroma of the temporal bone, and to discuss its diagnosis and treatment.
  
  
  METHODS
  A rare case of ossifying fibroma of the temporal bone was presented. The patient was a 8-year-old boy with a one year history of left ear discomfort, suppurative otorrhea and progressive hearing loss. Physical examination of the ear revealed a stenosis of left external auditory canal (EAC), and an obvious expansion at mastoid region. Audiometry showed no hearing of the left ear. A postauricular approach was used to expose the mass. Frozen section evaluation during operation was not definitive but suggested benign nature in histology. The tumor was fully resected. The EAC was sealed by sutured skin, and the extended mastoid cavity was obliterated with abdominal fat.
  
  
  RESULTS
  The final pathological report indicated the stromal cells were negative for S-100 protein and epithelia membrane antigen (EMA), supporting the diagnosis of ossifying fibroma. One-year follow-up showed the sealed EAC was satisfactory with complete interior and no tumor recurred.
  
  
  CONCLUSIONS
  Ossifying fibroma of the temporal bone is a rare entity, which is a benign neoplasm but may show an aggressive behavior by compression and encroachment upon adjacent structures. Early and complete removal was advocated.
authors.affiliation: Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
authors.forename: Hongjun
authors.initials: H
authors.lastname: Xiao
authors.forename: Shusheng
authors.initials: S
authors.lastname: Gong
authors.forename: Xiu
authors.initials: X
authors.lastname: Nie
authors.forename: Changkai
authors.initials: C
authors.lastname: Guo
authors.forename: Gang
authors.initials: G
authors.lastname: Zhong
mesh_terms: D001859:Bone Neoplasms; D002648:Child; D018214:Fibroma, Ossifying; D006801:Humans; D008297:Male; D013701:Temporal Bone / Q000473:pathology*