JOURNAL ARTICLE
RESEARCH SUPPORT, N.I.H., EXTRAMURAL
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PET/CT with 18 F Fluorocholine as an Imaging Biomarker for Chronic Liver Disease: A Preliminary Radiopathologic Correspondence Study in Patients with Liver Cancer.

Radiology 2018 April
Purpose To determine the relationship between hepatic uptake at preoperative fluorine 18 (18 F) fluorocholine combined positron emission tomography (PET) and computed tomography (CT) and the histopathologic features of chronic liver disease in patients with Child-Pugh class A or B disease who are undergoing hepatic resection for liver cancer. Materials and Methods Forty-eight patients with resectable liver tumors underwent preoperative 18 F fluorocholine PET/CT. Mean liver standardized uptake value (SUVmean ) measurements were obtained from PET images, while histologic indexes of inflammation and fibrosis were applied to nontumor liver tissue from resection specimens. Effects of histopathologic features on liver SUVmean were examined with analysis of variance. Results Liver SUVmean ranged from 4.3 to 11.6, correlating significantly with Knodell histologic activity index (ρ = -0.81, P < .001) and several clinical indexes of liver disease severity. Liver SUVmean also differed significantly across groups stratified by necroinflammatory severity and Metavir fibrosis stage (P < . 001). The area under the receiver operating characteristic curve for 18 F fluorocholine PET/CT detecting Metavir fibrosis stage F1 or higher was 0.89 ± 0.05, with an odds-ratio of 3.03 (95% confidence interval: 1.59, 5.88) and sensitivity and specificity of 82% and 93%, respectively. Conclusion Correlations found in patients undergoing hepatic resection for liver cancer between liver 18 F fluorocholine uptake and histopathologic indexes of liver fibrosis and inflammation support the use of 18 F fluorocholine PET/CT as a potential imaging biomarker for chronic liver disease. © RSNA, 2018.

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