title: National cancer database report on chondrosarcoma of the head and neck.
abstract: BACKGROUND
  Management of chondrosarcoma of the head and neck is largely based on single-institution reports with small numbers accrued over several decades.
  
  
  METHODS
  The American College of Surgeons' National Cancer Data Base included 400 cases of chondrosarcoma of the head and neck diagnosed between 1985 and 1995. Chi square analyses of selected contingency tables and Wilcoxon regression analyses of selected survival stratifications were performed.
  
  
  RESULTS
  Histologic types included conventional (80.8%), myxoid (10.5%), and mesenchymal (8.8%). The mesenchymal and myxoid subtypes were rare among white patients (17.1%) and more common among African-American (31.8%) and Hispanic patients (44.9%). Treatment was most commonly surgery alone (59.5%) and surgery with irradiation (21.0%). Disease-specific survival was 87.2% at 5 years and 70.6% at 10 years. Worse 5-year survival was associated with higher grade (67.3%), regional or distant spread (71.0%), and the myxoid (45.0%) or mesenchymal (53.2%) subtypes.
  
  
  CONCLUSIONS
  Chondrosarcoma of the head and neck encompasses a variety of lesions that differ substantially by demographic and tumor characteristics. Individual tumors can be classified further according to site of origin, histologic subtype, and tumor grade, which can be used to predict biologic behavior and prognosis.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City 52242, USA. lucy-karnell@uiowa.edu
authors.forename: B B
authors.initials: BB
authors.lastname: Koch
authors.forename: L H
authors.initials: LH
authors.lastname: Karnell
authors.forename: H T
authors.initials: HT
authors.lastname: Hoffman
authors.forename: L W
authors.initials: LW
authors.lastname: Apostolakis
authors.forename: R A
authors.initials: RA
authors.lastname: Robinson
authors.forename: W
authors.initials: W
authors.lastname: Zhen
authors.forename: H R
authors.initials: HR
authors.lastname: Menck
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D001859:Bone Neoplasms / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy; D016009:Chi-Square Distribution; D002813:Chondrosarcoma / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy; D016208:Databases, Factual; D005260:Female; D006258:Head and Neck Neoplasms / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D012042:Registries; D012307:Risk Factors; D017678:Sex Distribution; D013223:Statistics as Topic; D018709:Statistics, Nonparametric; D016019:Survival Analysis; D016896:Treatment Outcome; D014481:United States / Q000453:epidemiology