title: [Clear cell chondrosarcoma (CCCS) of the nasal septum].
abstract: BACKGROUND
  Chondrosarcomas belong to the most common malignomas of the skeletal system. The vast majority is located at the epiphysis of the long bones or in the pelvis. Less than 10% of chondrosarcomas are located in the head and neck area, most common in the bony viscerocranium and the larynx. Five histological variants can be differentiated: conventional, mesenchymal, myxoid, dedifferentiated and in less than 5% clear cell chondrosarcomas (CCCS). This case report gives the first description of a CCCS originating from the nasal septum.
  
  
  METHODS
  A 79 year old female complaining about a 6 month history of nasal obstruction revealed a huge ballooning of the basal septum in anterior rhinoscopy. Computed tomography exhibited a septal tumor with amorphous calcification. Histology of the tumor resected via lateral rhinotomy confirmed a diagnosis of CCCS. Because of clear surgical margins no radiation therapy was performed. The patient stayed free of recurrence during follow-up of sixteen months.
  
  
  CONCLUSIONS
  The patient presented with typical symptoms of nasoseptal tumors as well as representative CT-scans and histologic findings of CCCS. Because of the complete resection and the CCCS-subtype, the patient is expected to have a positive prognosis.
authors.affiliation: Klinik für Hals-, Nasen-, Ohrenheilkunde, Kopf- und Halschirurgie der Ruhr-Universität Bochum, St. Elisabeth-Hospital, Bochum. Sara.Euteneuer@rub.de
authors.forename: S
authors.initials: S
authors.lastname: Euteneuer
authors.forename: H
authors.initials: H
authors.lastname: Sudhoff
authors.forename: H
authors.initials: H
authors.lastname: Stein
authors.forename: G
authors.initials: G
authors.lastname: Delling
authors.forename: S
authors.initials: S
authors.lastname: Dazert
mesh_terms: D000368:Aged; D019902:Chondrocytes / Q000473:pathology; D003937:Diagnosis, Differential; D004724:Endoscopy; D005260:Female; D006801:Humans; D009300:Nasal Septum / Q000473:pathology / Q000601:surgery; D009669:Nose Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed