Michael C Wallace1,2,3, Kenny Sek4, Roslyn J Francis5,4, Shaun Samuelson6, John Ferguson6, Jonathan Tibballs6, Ali Asad7, David B Preen8, Gerry MacQuillan9,5, George Garas9,5, Leon A Adams9,5, Gary P Jeffrey9,5. 1. Department of Hepatology, Sir Charles Gairdner Hospital, Hospital Avenue, Nedlands, Perth, 6009, WA, Australia. michael.wallace2@health.wa.gov.au. 2. Medical School, University of Western Australia, Nedlands, WA, Australia. michael.wallace2@health.wa.gov.au. 3. School of Population and Global Health, University of Western Australia, Nedlands, WA, Australia. michael.wallace2@health.wa.gov.au. 4. Department of Nuclear Medicine, Sir Charles Gairdner Hospital, Nedlands, WA, Australia. 5. Medical School, University of Western Australia, Nedlands, WA, Australia. 6. Department of Radiology, Sir Charles Gairdner Hospital, Nedlands, WA, Australia. 7. Department of Medical Technology and Physics, Sir Charles Gairdner Hospital, Nedlands, WA, Australia. 8. School of Population and Global Health, University of Western Australia, Nedlands, WA, Australia. 9. Department of Hepatology, Sir Charles Gairdner Hospital, Hospital Avenue, Nedlands, Perth, 6009, WA, Australia.
Abstract
BACKGROUND AND AIMS: 18F-fluorocholine positron emission tomography/computed tomography (18F-FCH PET/CT) is an emerging functional imaging technique in the diagnosis and management of hepatocellular carcinoma (HCC). The aim of this study was to assess the ability of a pre- and post-treatment 18F-FCH PET/CT to predict prognosis and treatment response in early-stage HCC. METHODS: Patients with early- or intermediate-stage HCC planned for locoregional therapy were prospectively enrolled. Baseline demographic and tumor information was collected and baseline and post-treatment 18F-FCH PET/CT performed. Maximum standardized uptake values (SUVmax) were determined for each HCC lesion, and the difference between baseline and post-treatment SUVmax values were compared with progression-free survival outcomes. RESULTS: A total of 29 patients with 39 confirmed HCC lesions were enrolled from a single clinical center. Patients were mostly men (89.7%) with hepatitis C or alcohol-related cirrhosis (65.5%) and early-stage disease (89.7%). Per-patient and per-lesion sensitivity of 18F-FCH PET/CT was 72.4% and 59.0%, respectively. A baseline SUVmax < 13 was associated with a superior median progression-free survival compared with an SUVmax of > 13 (17.7 vs. 5.1 months; p = 0.006). A > 45% decrease in SUVmax between baseline and post-treatment 18F-FCH PET/CT ("responders") was associated with a superior mean progression-free survival than a percentage decrease of < 45% ("non-responders," 36.1 vs. 11.6 months; p = 0.034). CONCLUSIONS: Baseline and post-treatment 18F-FCH PET/CT predicts outcomes in early-stage HCC undergoing locoregional therapy. This technique may identify patients with an objective response post-locoregional therapy who would benefit from further therapy.
BACKGROUND AND AIMS: 18F-fluorocholine positron emission tomography/computed tomography (18F-FCH PET/CT) is an emerging functional imaging technique in the diagnosis and management of hepatocellular carcinoma (HCC). The aim of this study was to assess the ability of a pre- and post-treatment 18F-FCH PET/CT to predict prognosis and treatment response in early-stage HCC. METHODS:Patients with early- or intermediate-stage HCC planned for locoregional therapy were prospectively enrolled. Baseline demographic and tumor information was collected and baseline and post-treatment 18F-FCH PET/CT performed. Maximum standardized uptake values (SUVmax) were determined for each HCC lesion, and the difference between baseline and post-treatment SUVmax values were compared with progression-free survival outcomes. RESULTS: A total of 29 patients with 39 confirmed HCC lesions were enrolled from a single clinical center. Patients were mostly men (89.7%) with hepatitis C or alcohol-related cirrhosis (65.5%) and early-stage disease (89.7%). Per-patient and per-lesion sensitivity of 18F-FCH PET/CT was 72.4% and 59.0%, respectively. A baseline SUVmax < 13 was associated with a superior median progression-free survival compared with an SUVmax of > 13 (17.7 vs. 5.1 months; p = 0.006). A > 45% decrease in SUVmax between baseline and post-treatment 18F-FCH PET/CT ("responders") was associated with a superior mean progression-free survival than a percentage decrease of < 45% ("non-responders," 36.1 vs. 11.6 months; p = 0.034). CONCLUSIONS: Baseline and post-treatment 18F-FCH PET/CT predicts outcomes in early-stage HCC undergoing locoregional therapy. This technique may identify patients with an objective response post-locoregional therapy who would benefit from further therapy.
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