An adenocarcinoma that arises from the gallbladder. It is characterized by the presence of extracellular mucin that constitutes more than fifty-percent of the tumor. The disease is MONDO_0004067 (gallbladder mucinous adenocarcinoma). Also known as: colloid carcinoma of gallbladder, colloid carcinoma of the gallbladder, colloidal carcinoma of gallbladder, colloidal carcinoma of the gallbladder, gall bladder mucinous adenocarcinoma, gallbladder colloid carcinoma, gallbladder colloidal carcinoma, mucinous carcinoma of gallbladder.