Clinical Correlation Evaluation of the LIVERFASt Test for Diagnosing Important Liver Lesions of Fibrosis and Steatosis Against Magnetic Resonance Elastography (MRE) for Liver Fibrosis and MR-based Assessment of Steatosis, in Adult US Population.

• To assess the correlation and the strength of concordance of LIVERFASt for staging important liver lesions of fibrosis and steatosis against MR liver assessment of clinically significant (≥F2 stage), advanced fibrosis (≥F3 stage) and cirrhosis (F4 stage) (MRE, ct1) and steatosis (MR) in a SLD (MASLD, MetALD) adult US population.
• To assess the diagnostic performance [AUROC (95%CI)] of LIVERFASt for diagnosing important liver lesions of fibrosis, steatosis taking MR-based methods as surrogate gold-standard (MRE for fibrosis assessment and MR for steatosis quantification).

Inclusion criteria

• SLD with MASLD or MetALD Adult patients with:

• available historical report of MRE and LIVERFASt test
• at least fibrosis scoring available (steatosis and necro-inflammation imaging reports are requested equally when available).
• Other imaging modality reports ie. MRI, ARFI, ct1, SWE and Fibroscan can be included when available

Exclusion criteria

• Participants identified as having risk factors for false positive/negative results for Liverfast (severe intravascular hemolysis-if condition is known-, acute hepatitis or severe cytolysis with ≥ 600 ALT values)
• Other comorbidities not compatible with the diagnosis of MASLD or MetALD