Fig. 8
From: LI-RADS v2017 for liver nodules: how we read and report
LR-4. a Unenhanced MDCT shows a 3.5 cm mass adjacent to the gallbladder (arrows). Measured density is − 9 HU, indicative of intralesional fat. Enhanced images in the b arterial, c venous, and d delayed phases show moderate marginal enhancement (no arterial phase hypervascularity) without washout. Accordingly, observation would be categorized LR-3, but presence of intralesional fat indicates upgrade to LR-4. Lesion was biopsied, which revealed a fatty regenerative nodule