LI-RADS Categorization
Patient Information:
Age (years):
Algorithm not applicable for patients under 18 years.
Risk Factors / Conditions:
Cirrhosis
Chronic Hepatitis B viral infection
Current or prior HCC
Cirrhosis due to congenital hepatic fibrosis
Cirrhosis due to a vascular disorder (e.g., HHT, Budd-Chiari, chronic portal vein occlusion, cardiac congestion)
Diffuse nodular regenerative hyperplasia
Algorithm not applicable for selected conditions (Congenital Hepatic Fibrosis, specific Vascular Disorders, DNRH).
Observation Location:
Tumor-in-vein?
Yes
No
Arterial phase hyperenhancement?
Yes
No
Tumor size (mm):
Features:
Enhancing capsule
Non-peripheral washout
Threshold growth
Ancillary Features
Favoring malignancy in general
US visibility as discrete nodule
Subthreshold growth
Restricted diffusion
Mild-moderate T2 hyperintensity
Corona enhancement
Fat sparing in solid mass
Iron sparing in solid mass
Transitional phase hypointensity
Hepatobiliary phase hypointensity
Favoring HCC in particular
Nonenhancing “capsule”
Nodule-in-nodule
Mosaic architecture
Blood products in mass
Fat in mass, more than adjacent liver
Favoring Benignity
Size stability > 2 yrs
Size reduction
Parallels blood pool
Undistorted vessels
Iron in mass, more than liver
Marked T2 hyperintensity
Hepatobiliary phase isointensity
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