Metastatic rectal neuroendocrine tumor to kidney, pancreas, and bone following renal tumor resected with robot-assisted laparoscopic partial nephrectomy

Abstract

Neuroendocrine tumor (NET) is a rare tumor commonly found in the gastrointestinal tract and lungs and rarely originates from and metastasizes to the kidney. We report a case of a 66-year-old man with metastatic rectal NET to the kidney, pancreas and bone following the resection of renal tumor with robot-assisted partial nephrectomy (RAPN). A rectal tumor of 10mm in diameter had been endoscopically resected and diagnosed NET with positive surgical margin 9 years before RAPN. Somatostatin receptor (SSR) scintigraphy revealed the other two metastases postoperatively, therefore is an effective tool to detect primary and metastatic sites of NETs.

Keywords

• Neuroendocrine tumor
• Renal tumor
• Pancreas and bone metastasis
• Robot-assisted laparoscopic partial nephrectomy
• Somatostatin receptor scintigraphy