The Gessy procedure is used to treat congenital biliary atresia in newborns, and the procedure is so effective that it is consistently recommended by pediatric hepatobiliary surgeons. The Gessy procedure consists of three main steps: 1. Stripping of the fibrous mass from the patient’s hilar region to discover the remaining bile ducts on the surface of the liver or in the hilar region, which is a critical part of the success of the surgery. 2. Anastomosis of the hepatic bile ducts to the jejunum to divert bile and other substances synthesized and secreted by the liver into the digestive tract. 3. Reconstruction of the jejunal circuit, where the severed intestinal tubes are reanastomosed to reconstruct the digestive circuit. Although the Gessy procedure is surgically effective, it is risky and has a series of post-surgical complications, so it is recommended that children’s specialty medical centers be consulted to avoid delays.