[Agenesis of the gallbladder: a case report].

Agenesis of the gall-bladder is a very rare affection. The pathogeny is correlated with abnormality affecting the embryogenesis of hepatic diverticulum which explain the frequent association with others malformations. The diagnosis is exceptionnaly made preoperatively. Laparotomy confirm the diagnosis and the surgeon must explore the habitual ectopic site by manual explorations, sonography and cholangiography before concluding at the diagnosis of agenesis of gall-bladder.