An unusual location of heterotopic gastric mucosa causing partial obstruction of the common bile duct is recorded. Frozen section led to a mistaken diagnosis of adenocarcinoma. The common bile duct was resected and a choledochoduodenostomy performed. The precise relationship between this form of heterotopia and gallbladder adenomyoma has not been determined. In this case both lesions coexisted.
Welling RE, Krause RJ, Alamin K. Heterotopic Gastric Mucosa in the Common Bile Duct. Arch Surg. 1970;101(5):626-627. doi:10.1001/archsurg.1970.01340290082019