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The prognosis of fibrolamellar carcinoma (FLC) versus conventional hepatocellular carcinoma (HCC) remains controversial. Thus, this study aimed to compare the prognosis of FLC and HCC. Patients with FLC and HCC in the Surveillance, Epidemiology, and End Results (SEER) database between 2000 and 2015 were included. Propensity score matching (PSM) was performed to balance the clinical characteristics between FLC and HCC. Cox regression and Kaplan-Meier analysis were applied to identify the effect of pathology in prognosis before and after match in the whole cohort, as well as in subgroups of fibrosis score, AJCC stage and therapy. A total of 213 patients with FLC and 33365 patients with HCC between 2000 and 2015 were identified. Before matching, the overall survival (OS) and cancer-specific survival (CSS) were significantly better in FLC than HCC. After matching, FLC patients had better OS than HCC patients, but the CSS was similar between groups. Further analyses found that in patients at early stage (AJCC I-III) and/or accepted curative therapy, the prognosis was comparable between HCC and FLC. In patients without cirrhosis (F0), the HCC patients had similar prognosis with FLC patients. Prognosis benefit of FLC was observed in subgroups of AJCC stage IV and non-curative therapy, however, the concomitant diseases may affect the results. The prognosis of FLC was significantly better than HCC before matching. However, after matching for clinical characteristics, the CSS was comparable between FLC and HCC.

The prognosis of fibrolamellar carcinoma versus conventional hepatocellular carcinoma: a study based on propensity score matching