[A Case of Synchronous and Solitary Gallbladder Metastasis from Gastric Cancer].

A 60s woman was found to have wall thickening of the gastric body and gallbladder in the follow-up CT scan after surgery for cervical carcinoma. An endoscopic examination revealed a type 3 tumor, located in the lesser curvature of the middle stomach. Abdominal CT showed lymphadenopathy at the lesser curvature. An enhanced thickened wall was also noted in the fundus of the gallbladder. FDG-PET/CT showed negative uptake in the gallbladder lesion. Distal gastrectomy and cholecystectomy were performed under the preoperative diagnosis of gastric cancer and adenomyomatosis. Histopathologically, the gastric lesion was a poorly differentiated adenocarcinoma, SE, ly1c, v1b. Moreover, the gallbladder lesion was a poorly differentiated adenocarcinoma proliferating mainly in the muscularis propria and subserosa, which had similar histological features as those in the adenocarcinoma part of gastric cancer. From these findings, the patient was diagnosed with gallbladder metastasis from gastric cancer. Gastric cancer rarely metastasizes to the gallbladder, and only 16 cases have been reported in Japan. We present the clinicopathological features with a review of the literature.