Caroli's disease or communicating ectasia of the intrahepatic biliary tree
is a rare disease with unknown aetiology. The coexistence of this along wit
h the uncommon condition of a gastric diverticulum has never been reported
before. A deficiency in the fibromuscular matrix of both the bile ducts and
the gastric wall may explain why these two pathologies may coexist in a si
ngle patient.