Management of unresectable hilar bile duct cancer--preoperative diagnosis, treatment selection, and clinical outcome.

Background/Aims: Hilar bile duct cancer progresses slowly but easily invades the nearby portal vein or hepatic artery. Thus, in some cases, curative resection is impossible, so we need to determine the best non-surgical treatments for this tumor. Methodology: We classified 98 patients with hilar bile duct cancer into 3 categories: a non-surgical group (34 cases), an exploratory laparotomy group (9 cases), and a surgical resection group (55 cases). Survival rates were examined in the light of clinical factors. Results: In the non-surgical group, extensive vessel invasion was the most common reason for unresectability (13 cases), with broad biliary extension the second most common (11 cases). In the exploratory laparotomy group the most common reason for unresectability was severe vessel invasion (6 cases). Cumulative 1- and 2-year survival rates for patients with unresectable tumors without distant metastasis were 26.9% and 7.2%, respectively. One- and 2-year survival rates for patients with unresectable tumors and with total bilirubin of less than 2mg/dL on discharge were 36.8% and 9.8%, respectively. The 1-year survival rate with placement of an expandable metallic stent was as high as 55.6%; without the stent it was 7.1% (P=0.005). Radiation therapy gave a better prognosis than did no radiation (P= 0.01). Conclusions: Portal and arterial invasion were the principal reasons for unresectability. Use of an expandable metallic stent or radiation therapy, and a total bilirubin level of less than 2mg/dL on discharge, were factors that enhanced survival in unresectable cases, but distant metastasis, dissemination, and poor general condition or liver function were negative factors for survival.