Abstract
510 Background: Fibrolamellar Carcinoma (FLC) is a rare liver cancer affecting young adults without underlying liver disease. Surgery is the only proven therapy, and recurrence is common. There are no proven systemic treatments, especially for high-risk FLC (unresectable, relapse, progression, metastatic). Research suggests that immunotherapy may work. We share our experience using systemic “triple immunochemotherapy” (TT): 2 week cycles of 7 days continuous infusion 5FU or oral capecitabine, interferon alpha-2b on days 1,3,5,7 or PEG-Interferon and nivolumab on day 1. Methods: Data from all patients who received TT from 5/2018 to 9/2019 was reviewed to assess tolerability, survival and toxicity. Results: 14 patients were treated with TT of which 10 (8F,2M with a median age of 20) were evaluable. They received a median of 13 cycles (6-31). At time of analysis, the median progression free survival was 6 months, 22% longer than prior to TT, with 80% of patients (8) stable or improving, 1 progression, and 1 who died 2 months after initiating TT. For the 4 patients who achieved surgical remission, none have relapsed (PFS 9 months). Overall objective response (CR+PR) and tumor control rate (CR+PR+SD) were 60% and 80%, respectively. There were no withdrawals from treatment due to side effects, though 2 had dose adjustments. All experienced mild adverse effects, most commonly fever and headache, but only 2 patients had grade 3 toxicity. Conclusions: Our early results of TT for high-risk FLC are promising, with good tolerability and treatment response, particularly in patients who have achieved surgical CR. Further longitudinal data is needed to confirm outcomes, especially in patients still early in their treatment. [Table: see text]
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