title: Sarcomatoid carcinoma with osseous differentiation in the bladder.
abstract: BACKGROUND
  Bladder sarcomatoid carcinoma is a very rare variant of transitional cell carcinoma. With disputed nomenclature, the tumor has been described previously under a variety of names such as sarcomatoid carcinoma, pseudosarcoma, malignant mixed mesodermal/Müllerian tumor, metaplastic carcinoma and spindle cell carcinoma. This malignancy represents 0.3% of all bladder tumors and has an aggressive behavior yielding a poor prognosis despite radio and chemotherapy.
  
  
  METHODS
  An 81 y/o man presented with a transitional cell carcinoma and underwent a transurethral resection. Adjuvant onco-BCG was introduced. After 9 months of follow-up, a local tumoral recurrence occurred and a new transurethral resection revealed sarcomatoid carcinoma with osseous elements. A radical cystoprostatectomy was then carried out.
authors.affiliation: Portuguese Beneficent Hospital, Sao Paulo, SP, Brazil. luis64@ig.com.br
authors.forename: Luis F
authors.initials: LF
authors.lastname: Arenas
authors.forename: Dercilio A
authors.initials: DA
authors.lastname: Fontes
authors.forename: Emilio M
authors.initials: EM
authors.lastname: Pereira
authors.forename: Flavio L
authors.initials: FL
authors.lastname: Hering
mesh_terms: D000276:Adjuvants, Immunologic / Q000627:therapeutic use; D000369:Aged, 80 and over; D001500:BCG Vaccine / Q000627:therapeutic use; D002295:Carcinoma, Transitional Cell / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D015653:Cystectomy; D017809:Fatal Outcome; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000601:surgery; D011468:Prostatectomy; D001749:Urinary Bladder Neoplasms / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery
chemical_list: D000276:Adjuvants, Immunologic; D001500:BCG Vaccine