gallbladder ( gallbladder duplication) is a very rare biliary anomaly
and one of the twins may be intrahepatic.
It is usually discovered
as an incidental finding.
Cholecystography often fails to be diagnostic, because the shadow of
the two gallbladders are superimposed.
G. Desolneux, S. Mucci, J. Lebigot, J. P.
Arnaud, and A. Hamy, “Duplication of the Gallbladder. A Case Report,”
Gastroenterology Research and Practice, vol. 2009, Article ID 483473,
3 pages, 2009. doi:10.1155/2009/483473