Gastric Stump Cancer Following Gastrectomy After Renal Transplantation: A Case Report.

A patient who had previously undergone a gastrectomy due to gastric ulcer perforation was admitted to our hospital. He presented with epigastric pain and poor oral intake accompanied with gastrointestinal bleeding, and was diagnosed with gastric stump cancer. He had a history of renal transplantation and was administered immunosuppressive agents. To alleviate the obstructive symptom and cure the gastrointestinal bleeding, the patient underwent surgical resection of the malignant tumor, with stable kidney function during the perioperative period. To the best of our knowledge, this is the first case reported in the English literature concerning gastric stump cancer that developed after renal transplantation. We speculate that the long-term use of immunosuppressants concomitant with gastrointestinal disorders after gastric surgery was an important causative factor in its etiology. We also investigated the possible treatment for it.