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Phase 3 Validation of PAaM for Hepatocellular Carcinoma Risk Stratification in Cirrhosis.

Fujiwara N, Lopez C, Marsh TL, Raman I, Marquez CA, Paul S, Mishra SK, Kubota N, Katz C, Kanzaki H, Gonzalez M, Quirk L, Deodhar S, Selvakumar P, Raj P, Parikh ND, Roberts LR, Schwartz ME, Nguyen MH, Befeler AS, Page-Lester S, Srivastava S, Feng Z, Reddy KR, Khaderi S, Asrani SK, Kanwal F, El-Serag HB, Marrero JA, Singal AG, Hoshida Y. Phase 3 Validation of PAaM for Hepatocellular Carcinoma Risk Stratification in Cirrhosis. Gastroenterology. 2024 Nov 8.

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Abstract:

BACKGROUND and AIMS: Hepatocellular carcinoma (HCC) risk stratification is an urgent unmet need for cost-effective HCC screening and early detection in patients with cirrhosis to improve poor HCC prognosis. METHODS: Molecular (prognostic liver secretome signature with -fetoprotein) and clinical (aMAP [age, male sex, albumin-bilirubin, and platelets] score) variable-based scores were integrated into PAaM (prognostic liver secretome signature with -fetoprotein plus age, male sex, albumin-bilirubin, and platelets), which was subsequently validated in 2 phase 3 biomarker validation studies: the statewide Texas HCC Consortium and nationwide HCC Early Detection Strategy prospective cohorts, following the prospective specimen collection, retrospective blinded evaluation design. The associations between baseline PAaM and incident HCC were assessed using Fine-Gray regression, with overall death and liver transplantation as competing events. RESULTS: Of 2156 patients with cirrhosis in the Texas HCC Consortium, PAaM identified 404 (19%) high-risk, 903 (42%) intermediate-risk, and 849 (39%) low-risk patients with annual HCC incidence rates of 5.3%, 2.7%, and 0.6%, respectively. Compared with low-risk patients, high- and intermediate-risk groups had sub-distribution hazard ratios for incident HCC of 7.51 (95% CI, 4.42-12.8) and 4.20 (95% CI, 2.52-7.01), respectively. Of 1328 patients with cirrhosis in the HCC early detection strategy, PAaM identified 201 high-risk (15%), 540 intermediate-risk (41%), and 587 low-risk (44%) patients, with annual HCC incidence rates of 6.2%, 1.8%, and 0.8%, respectively. High- and intermediate-risk groups were associated with sub-distribution hazard ratios for incident HCC of 6.54 (95% CI, 3.85-11.1) and 1.77 (95% CI, 1.02-3.08), respectively. Subgroup analysis showed robust risk stratification across HCC etiologies, including metabolic dysfunction-associated steatotic liver disease and cured hepatitis C infection. CONCLUSIONS: PAaM enables accurate HCC risk stratification in patients with cirrhosis from contemporary etiologies.





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