[A Case of Submucosal-Like Tumor at Cecum That Was Diagnosed as Colon Metastasis from Gastric Cancer].

The patient was a 70-year-old woman who had received distal gastrectomy for the gastric cancer which histology was poorly differentiated adenocarcinoma, pT4a(SE), ly2, v0, pNX, H0, P1, cy0 and pStage Ⅳ. She was treated with SOX after the operation. However, 4 years after gastrectomy, contrast enhanced abdominal CT showed a mass in the cecum and colonoscopy revealed submucosal-like tumor in the cecum, but the pathological diagnosis was unclear. We diagnosed the malignant tumor in the cecum and performed laparoscopic ileocolic resection. Histology of the tumor showed a poorly differentiated adenocarcinoma and immunohistochemical staining showed CK7+, CK20± and CDX2±, therefore, the colon tumor was diagnosed as a metastasis from the gastric cancer. After the ileocolic resection, she was treated with SOX. It was suggested that we need to consider colon metastasis from gastric cancer in mind, when we find submucosal-like tumor in colon after gastric cancer resection.