Evaluation and Recommendation of the 8th Edition of American Joint Committee on Cancer (AJCC) Staging System for Intrahepatic Cholangiocarcinoma (ICC) in 820 Patients from the Surveillance, Epidemiology, and End Results (SEER) Database

The AJCC made four changes to T category in the 8th AJCC stage for ICC, but this is a topic of debate. Data from 820 patients with ICC were extracted from the SEER database. Survival analysis of the 8th AJCC stage was examined. To verify the four T staging changes by survival analysis: prognosis of patients with tumor size > 5 cm was poorer than that with tumor size ≤ 5 cm (P