Staging of advanced hepatocellular carcinoma patients in the targeted therapy era.

Abstract

209 Background: Several hepatocellular carcinoma (HCC) staging systems are currently available. However, they were all developed before the targeted therapy era prevailed in the last decade which has changed the natural history of the disease. Our study goal was to test the performance of different HCC staging systems in patients with HCC who were treated at our institution during the last decade. Methods: We prospectively enrolled 438 patients from early 2000 to late 2009. Baseline clinicopathologic parameters and staging were available, including the TNM, Cancer of the Liver Italian Program (CLIP), Barcelona Clinic Liver Cancer (BCLC), Okuda, and Chinese University Prognostic Index (CUPI). We performed survival and cox-regression analyses, and compared the staging systems’ predictive ability using Harrell's C-index. Finally, we performed a subgroup analysis of 3 independent cohorts based on whether or not they received sorafenib, whether or not they had hepatitis, and whether or not they had cirrhosis. Results: The overall survival was 13.9 months. Overall, CLIP score was the most predictive staging system with a C-index of 0.71. 187 patients were treated with targeted therapies and 138 were treated with sorafenib after it was approved in 2007. CLIP score was the most predictive staging system with a C-index of 0.71 in the no sorafenib group, and 0.74 in the sorafenib group. In hepatitis patients, CLIP topped amongst all staging systems with a C-index of 0.75, and in patients without hepatitis, despite all staging systems having a poor predictive ability, CLIP score still had the highest C-index of 0.67. Similarly, CLIP score had the best predictive ability in patients with and without pre-existing liver cirrhosis, with C-indices of 0.73 and 0.68 respectively. There was no statistically significant interaction between CLIP score and hepatitis status, and CLIP score and liver cirrhosis. Thus, overall the CLIP score was the best predictive system in all cohorts. Conclusions: Our results suggest that the CLIP score has the highest stratification ability in our advanced HCC patient population, including several subgroups. Our study confirms the utility of the CLIP score to stratify advanced HCC patients in clinical trials.