Acquired cystic disease-associated eosinophilic renal cell tumor : a case report

Abstract

The patient was a 57-year-old man who had begun hemodialysis in May 2000 duo to sclerotic kidney. In January 2008, periodic computed tomography showed an enhanced cystic mass in the left kidney. We diagnosed this patient as having renal cell neoplasm arising in acquired cystic disease of the kidney (ACDK). In February 2008, laparoscopic retroperitoneal nephrectomy was performed. Histopathological evaluation demonstrated that the tumor do not fit into the categories recognized in the current classification system. This tumor was composed mainly of large eosinophilic cells arranged in a solid pattern and contained deposits of calcium oxalate crystals.