Fig. 4.

58-year-old man with colon cancer and focal eosinophilic abscess confirmed by percutaneous sonography-guided biopsy (differential count of eosinophils in peripheral blood, 2%) in liver (false-negative lesion).

A. T2-weighted image shows non-spherical hypointense lesion (arrow). B. Unenhanced T1-weighted image shows hypointense lesion (arrow). C. Gadoxetic acid-enhanced dynamic images show rim enhancement (arrow) during arterial phase only (C) with hypointensity during portal and 3-minute late phases, without rim enhancement (not shown). D. Hepatobiliary phase image obtained 20 minutes after injection of contrast agent shows well-defined hypointense lesion (arrow). Size difference between T2 (21.5 mm) and hepatobiliary phase (21.3 mm) was 0.2 mm, which is minimal change in size (21.5 mm on T2-weighted and 21.3 mm on hepatobiliary phase images) compared to A. Lesion was misinterpreted as metastasis on both sessions by all observers.