title: Spontaneous regression of bone metastasis from renal cell carcinoma; a case report.
abstract: BACKGROUND
  Spontaneous regression of metastatic renal cell carcinoma is rarely observed.
  
  
  METHODS
  Metastatic renal cell carcinoma was identified in a 70-year-old male using computed tomography-guided percutaneous needle biopsy. Two months after the diagnosis, a partial resection of the sternal bone was performed. Pathological examination revealed granulated tissue with bleeding and necrosis but no carcinogenic cells.
  
  
  CONCLUSIONS
  We report a pathologically identified case in which a sternal bone metastasis that was noticed two years after radical nephrectomy regressed completely and spontaneously.
authors.affiliation: Division of Thoracic Diseases, Chiba Cancer Center, Japan. nakajii@fc.med.miyazaki-u.ac.jp
authors.forename: Takahiro
authors.initials: T
authors.lastname: Nakajima
authors.forename: Makoto
authors.initials: M
authors.lastname: Suzuki
authors.forename: Soichiro
authors.initials: S
authors.lastname: Ando
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Iida
authors.forename: Akinobu
authors.initials: A
authors.lastname: Araki
authors.forename: Takehiko
authors.initials: T
authors.lastname: Fujisawa
authors.forename: Hideki
authors.initials: H
authors.lastname: Kimura
mesh_terms: D000368:Aged; D001707:Biopsy, Needle; D001859:Bone Neoplasms / Q000473:pathology / Q000556:secondary*; D002292:Carcinoma, Renal Cell / Q000473:pathology* / Q000601:surgery; D006470:Hemorrhage; D006801:Humans; D008297:Male; D009336:Necrosis; D009392:Nephrectomy; D012075:Remission, Spontaneous; D014057:Tomography, X-Ray Computed