The gallbladder is a pear-shaped sac lying on the visceral surface of the right lobe of the liver in a fossa between the right and caudate lobes. It is composed of a fundus, body, and neck. It serves as a storage vessel for the bile, synthesized by the liver. The neck contains a mucosal fold, known as Hartmann’s pouch. This pouch represents a common location for gallstones to lodge and cause cholestasis.