Figure 10.

Improvement of overall survival among all patients with intrahepatic cholangiocarcinoma according to the registration period. A comparison of cumulative survival rates among patients newly registered between 1978 and 2009 (n = 9130). The median overall survival and survival rates (5‐year/10‐year) were 3.71 and 11.0%/8.2% for group 1 (n = 338), 7.56 months and 14.1%/7.7% for group 2 (n = 1056), 17.02 months and 22.6%/12.2% for group 3 (n = 4552), and 20.6 months and 30.9%/10.7% for group 4 (n = 3184).