Ectopic gastric mucosa of the common bile duct.

The finding of ectopic gastric mucosa is well documented throughout the gastrointestinal tract from the tongue to the rectum. Its presence within the gallbladder and the biliary tree is extremely rare and most probably secondary to an aberrant histogenesis. This brief report presents the second reported case of heterotopic gastric tissue within the common bile duct. A literature review, brief outline of embryologic features, histopathology, and clinical relevance are included in the discussion.