[A case in which a mucin-producing papillary adenocarcinoma of the gallbladder was resected].

An 81-year-old man complaining of abdominal pain underwent ultrasonography at another hospital that revealed gallbladder swelling, and he was admitted to our hospital for further examination. CT and ERCP revealed a papillary tumor extending from the body to the fundus, leading to the diagnosis of gallbladder cancer. Other examinations showed no sign of invasion or lymph node metastases. We performed full-thickness cholecystectomy. The histopathological diagnosis was mucin-producing papillary adenocarcinoma(T1N0M0, Stage I) of the gallbladder.