Stereotactic body radiotherapy for primary hepatic malignancies - Report of a phase I/II institutional study
Ashley A Weiner, Jeffrey Olsen, Daniel Ma, Pawel Dyk, Todd DeWees, Robert J Myerson, Parag Parikh, Ashley A Weiner, Jeffrey Olsen, Daniel Ma, Pawel Dyk, Todd DeWees, Robert J Myerson, Parag Parikh
Abstract
Background and purpose: To report outcomes and toxicities of a single-institution phase I/II study of stereotactic body radiotherapy (SBRT) in the treatment of unresectable hepatocellular cancer (HCC) and intrahepatic cholangiocarcinoma (IHC).
Materials and methods: Patients with Child-Pugh score less than 8 were eligible. A total of 32 lesions in 26 patients were treated with SBRT. Kaplan-Meier survival analysis was performed. Toxicities were graded by CTCAEv4 criteria and response was scored by EASL guidelines.
Results: Median prescribed dose was 55Gy (range 40-55Gy) delivered in 5 fractions. Mean tumor diameter was 5.0cm and mean GTV was 107cc. Median follow-up was 8.8months with a median survival of 11.1months, and one-year overall survival was 45%. Overall response rate was 42% and one-year local control was 91%. Nine patients experienced a decline in Child-Pugh class following treatment, and two grade 5 hepatic failure toxicities occurred during study follow-up.
Conclusions: Primary hepatic malignancies not amenable to surgical resection portend a poor prognosis, despite available treatment options. Though radiation-induced liver disease (RILD) is rare following SBRT, this study demonstrates a risk of hepatic failure despite adherence to protocol constraints.
Keywords: Cholangiocarcinoma; Hepatocellular carcinoma; SBRT.
Conflict of interest statement
Conflict of Interest: The following authors report the following potential conflicts of interest (authors not listed reported no potential conflicts): Dr. Olsen reports grants, travel expenses and speaker’s fees from ViewRay, Inc. Dr. Parikh reports grants from Philips Healthcare and Varian Medical Systems, ownership in Holaira, Inc, and acts as a consultant for Medtronic/Covidien.
Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.
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Source: PubMed