Cystoduodenal ligament as an abnormal fold and the accompanying anatomical and clinical implications.

This paper reports two cases of cadaveric cystoduodenal ligament in the lesser omentum, different from the commonly known hepatoduodenal and hepatogastric ligaments. Cystoduodenal ligament was occasionally reported and implies a variation in the anatomy of the omental bursa and its foramen. The omental foramen which has been commonly described to provide communication between the greater and the lesser sacs, and located posterior to the free egde of the lesser omentum, is not so in these cases. The knowledge of abnormal peritoneal folds like this may be important to surgeons, prosectors and radiologists.