Spontaneous regression of bone metastasis from renal cell carcinoma: A case report

Abstract

Background: Spontaneous regression of metastatic renal cell carcinoma is rarely observed. Case presentation: 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. Conclusion: We report a pathologically identified case in which a sternal bone metastasis that was noticed two years after radical nephrectomy regressed completely and spontaneously. © 2006 Nakajima et al; licensee BioMed Central Ltd.