Bouveret's Syndrome: A Rare Form of Gallstone Ileus Caused by Large Renal Cysts.

Bouveret's syndrome is a rare variant of gallstone ileus caused by gastric outlet obstruction that arises from gallstones impacted in the distal stomach or proximal duodenum after passing through a cholecystoduodenal or cholecystogastric fistula. Simple kidney cysts are one of the most common lesions found in the elderly. They are usually asymptomatic, but the cysts can put pressure on the surrounding organs if they grow to large dimensions.This case report highlights a rare case of Bouveret's syndrome due to the presence of a large gallstone in the pyloric region that was caused by the creation of a cholecystogastric fistula from pressure exerted by two giant cysts of the right kidney.