Complex sentence: If the intrahepatic biliary tree is unaffected, surgical reconstruction of the extrahepatic biliary tract is possible through an operation known as a Kasai procedure (after the Japanese surgeon who developed the surgery, Morio Kasai) or hepatoportoenterostomy.
Split into simpler sentences: If the intrahepatic biliary tree is unaffected, surgical reconstruction of the extrahepatic biliary tract is possible. This surgery is called a Kasai procedure (after the Japanese surgeon who developed the surgery, Morio Kasai) or hepatoportoenterostomy.