Assessing resectability in cholangiocarcinoma.

Assessment of surgical resectability in cholangiocarcinoma is more complicated than other gastrointestinal malignancies and remains unestablished. According to the primary origin and tumor extent, the applied surgical procedure varies from extrahepatic bile duct resection to right or left trisectionectomy concomitant with pancreatoduodenectomy. Portal vein resection and reconstruction during hepatectomy has been feasible. Thanks to the availability of new microscopic surgical techniques, hepatic arterial resection and reconstruction have also come to be applied for locally advanced cholangiocarcinoma cases. These vascular surgical techniques can expand surgical indications for advanced cholangiocarcinoma. On the other hand, determination of the tumor extent or staging still remains difficult and imprecise. The endoscopic approach has come to play significant roles both for preoperative biliary drainage and tumor staging. Estimation of the functional reserve of future remnant liver in cholestatic patients still remains unresolved. Hepatobiliary surgeons should carefully estimate the safety of the surgical procedure in each individual patient requiring extensive hepatobiliary resection. Early establishment of the measurement methods of the functional capacity of future remnant liver is an important and urgent issue for assessing safer surgical resectablity of cholangiocarcinoma.