A case of small intestinal metastasis from renal cell carcinoma that caused multiple intussusception

Abstract

The patient, a 78-year-old man, had a right nephrectomy for right renal cell carcinoma in April 2006. From about May 2008 he became aware of anorexia and staggering. Blood test showed Hb 6.7 g/dL and marked anemia. Lower gastrointestinal endoscopy revealed elevated lesions in the ascending colon, and the results of CT, barium enema and small intestine series revealed intussusception at two sites probably due to small intestinal tumor. Laparoscopic partial small bowel resection was performed for the two sites. Tumors were observed in the jejunum 80 cm from the Treitz ligament and in the ileum 28 cm upstream from the ileocaecal valve. They were histopathologically diagnosed as clear cell carcinoma that metastasized from renal cell carcinoma. While metastases to the lung, mediastinal lymph nodes, scalp and brain have been found, he is presently surviving 5 months after surgery. We report the case with bibliographic discussion.