Variant anatomy of structures in Calot’s triangle

The variant anatomy of the biliary tract and its sources of blood supply causes technical difficulties and increases the risk of damage to these main structures in the area of the porta hepatis and hepatoduodenal ligament during hepatobiliary operations, especially laparoscopic cholecystectomy. The main structures form a single topographic formation – the Calot’s triangle, with possible multiple anatomical variations, considered in the literature review.