Metastatic Colon Cancer from Asymptomatic Gastric Stump Cancer: Report of a Rare Case

Background: Herein we present a rare case of metastatic tumor in transverse colon originating from an asymptomatic gastric stump cancer. Case presentation: A 55-year-old woman underwent partial gastrectomy and pyloroplasty for the gastrointestinal stromal tumor in the stomach in 2006. She developed abdominal fullness and a reduced appetite in April 2015. Colonoscopy and computerized tomography indicated primary transverse colon cancer with obstruction and multiple liver metastases. She underwent an emergency extended right hemicolectomy, and pathological analysis revealed a secondary colon cancer. A series of examinations after an operation, including gastric endoscopy with biopsy, and pathology examination including immunohistochemical studies, indicated a metastatic adenocarcinoma from a gastric stump. Conclusion: This case may provide physicians with additional knowledge on rare presentations of gastric stump.