A case of primary renal angiosarcoma in a patient with end-stage renal disease

Primary renal angiosarcoma is a rare and fatal malignant tumor. About 20 cases have been reported in the literature, but there has been no report of renal angiosarcoma in Korea. A 67-year old man with end-stage renal disease was admitted to the hospital for left flank pain. A computed tomography examination revealed a subcapsular hemorrhage in the left kidney. The patient was discharged after 2 weeks of observation. However, at 6 weeks after the discharge, the patient revisited the outpatient clinic due to aggravating pain, and a left nephrectomy was performed. The histopathological diagnosis was angiosarcoma. Three weeks after the nephrectomy, a re-operation was performed because of uncontrolled intra-abdominal bleeding. The surgical findings revealed massive metastasis. The patient died of an uncontrolled hemorrhage about 1 week after the second surgery. To our knowledge, this is the first report of a renal angiosarcoma in a patient with end-stage renal disease. It should be noted that a renal angiosarcoma may be a cause of a retroperitoneal hematoma.