Solitary Metastatic Tumor of the Pancreas Originating from Renal Cell Carcinoma. A Case Report.

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A tumor metastatic to the pancreas is clinically very rare, and is usually a sign of widespread primary malignancy. Surgery is infrequently the treatment of choice. We report a patient with resectable solitary pancreatic metastasis originating from renal cell carcinoma. A 72-year-old woman who underwent left nephrectomy for renal cell carcinoma at age 68 presented a mass in the head of the pancreas on follow-up examination with ultrasonography and computed tomography, and angiography showed a tumor stain. No abnormalities were seen in ERCP. A non-functional endocrine tumor or metastatic tumor was suspected. Laparotomy showed a mass covered by the pancreatic capsule and protruding from the head of the pancreas without regional lymph node metastasis. The tumor occupied the capsule itself and had not invaded the pancreatic parenchyma. It was enucleated outside of the capsule in the pancreas parenchyma. The resected specimen was 3×2.5×1.8cm and histological findings showed metastasis of renal cell carcinoma. It is difficult to evaluate distant metastasis because another primary carcinoma of the cecum was found 19 months later. The woman is alive without local recurrence 4 years after pancreatic surgery.
日本臨床外科学会の論文