Table 2 Imaging features of intrahepatic cholangiocarcinoma presenting as pyogenic liver abscess
Imaging modality | Imaging features | Frequency |
|---|---|---|
Ultrasonography | A prominent edema belt surrounding the mass and an intralesional irregular necrotic/liquidized area | 2/3 |
Low blood supply to the mass parenchyma | 2/3 | |
Multiple lymph nodes enlargement in the hepatic hilar area and the retroperitoneal space | 3/3 | |
CT/MRI | Large, patchy necrotic area without enhancement in the mass; no double target sign of liver abscess; rough and irregular inner wall; multiple dot/patchy and wall nodule enhancements in the mass | 8/8 |
The abscess wall and the marginal parenchyma were supplied by the hepatic artery; the intralesional arteries were rough and disrupted; a rapid-increase-rapid-decrease pattern of the peripheral lesion enhancement | 4/8 | |
Bile duct dilatation adjacent to the mass; intrahepatic cholangiolithiasis in two patients showed CT hypodensity, T1 hypointensity, T2 hyperintensity, and delayed enhancement | 4/8 | |
Diffusion-weighted imaging | Significant restricted diffusion in the necrotic area of the mass; irregular ring-like restricted diffusion in the marginal parenchyma; hyperintensity in the diffusion-weighted images and hypointensity in the apparent diffusion coefficient images | 7/7 |
T1-weighted imaging | Multiple patchy hemorrhagic foci in the mass | 3/7 |
Ultrasonography/CT/MRI | Multiple lymph nodes enlargement in the hepatic hilar area and the retroperitoneal space | 5/8 |