title: Metastatic osteosarcoma of the kidney presenting as renal hemorrhage.
abstract: OBJECTIVE
  Renal osteosarcoma may arise as a metastasis from a primary bone osteosarcoma or as a primary renal tumor. Metastatic renal osteosarcoma has been found at autopsy in approximately 10% of patients who die of this disease.
  
  
  METHODS
  A case report of a young Chinese patient presenting with acute onset of renal infarction and hemorrhage from a renal metastasis of osteosarcoma is presented, as well as a review of the literature.
  
  
  RESULTS
  Some patients with solitary renal metastatic osteosarcoma may have long-term disease-free survival after nephrectomy. Early diagnosis and thus increased awareness of this condition is important.
authors.affiliation: Division of Internal Medicine, St. Michael's Hospital, Toronto, Ontario, Canada.
authors.forename: W N
authors.initials: WN
authors.lastname: Raby
authors.forename: P
authors.initials: P
authors.lastname: Kopplin
authors.forename: S
authors.initials: S
authors.lastname: Weitzman
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005260:Female; D006470:Hemorrhage; D006801:Humans; D007674:Kidney Diseases; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary* / Q000601:surgery; D009392:Nephrectomy; D012516:Osteosarcoma / Q000000981:diagnostic imaging / Q000556:secondary* / Q000601:surgery; D014057:Tomography, X-Ray Computed