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