title: [Ossifying fibromyxoid tumor of soft parts].
abstract: BACKGROUND
  OMFT are nearly always benign, usually presented in soft tissue, of uncertain origin and tend to relapse. They are regarded as neoplasms of the adult, only three cases of children have been reported so far.
  
  
  METHODS
  A case of a 12-year-old boy is presented, for the first time, with an OMFT in the nasal cavity and the paranasal sinus. The diameter measured 9 centimetres. Histologically the tumor consisted of a myxoid matrix and showed areas of metaplastic bone. Most of the cells showed a spindleform and sometimes polymorphic hyperchromatic nuclei. The tumor expressed S-100 protein and vimentin. The cellularity was moderately high, the mitotic rate was very low.
  
  
  CONCLUSIONS
  OMFT are rare neoplasms, the diagnosis should be verified histopathologically. Complete excision should be performed. A clinical follow-up is necessary.
authors.affiliation: Klinik für Hals-Nasen-Ohrenheilkunde, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Paschen
authors.forename: H
authors.initials: H
authors.lastname: Guski
authors.forename: K
authors.initials: K
authors.lastname: Haake
mesh_terms: D002648:Child; D018214:Fibroma, Ossifying / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D006801:Humans; D008297:Male; D009669:Nose Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D010255:Paranasal Sinus Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D009418:S100 Proteins / Q000032:analysis; D012983:Soft Tissue Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed; D014746:Vimentin / Q000032:analysis
chemical_list: D009418:S100 Proteins; D014746:Vimentin