Pancreatic metastases of renal cell carcinoma--case report.

Metastasis to the pancreas from renal cell carcinoma is distinctly uncommon. A solitary renal cell carcinoma (RCC) metastasis to the head of pancreas is rarely encountered. We present a 55 years old male who was admitted in our hospital with the complaint of abdominal pain on and off but more continuous since 15 days. He did not have any urinary symptoms. The laboratory tests were within the normal limits. Ultrasound of abdomen revealed an encapsulate mass in the kidney plus a mass in the head of pancreas, but no other distant metastases. On histopathological examination, sections of the renal mass showed features of a highly vascularized, clear cell neoplasm, with solid, nested, and alveolar architecture, consistent with RCC, clear cell type. Fine needle aspiration from the mass in the head of the pancreas confirmed the diagnosis of metastatic renal cell carcinoma, clear cell type. In the absence of widespread disease, pancreatic resection can provide long term survival in metastatic RCC, although few cases have been reported with lengthy follow up. The prognosis is better than for pancreatic adenocarcinoma.