Analysis of intrahepatic sarcomatoid cholangiocarcinoma: Experience from 11 cases within 17 years

Table 4 Imaging findings of the patients with intrahepatic sarcomatoid cholangiocarcinoma

Case	US	CT Non-E	CT arterial	CT portal	CT delayed	Initial radiologic impression
1	Lobulated, heterogeneously hyperechoic	N/A	Thin rim enhancement	Gradual centripetal enhancement	Gradual centripetal enhancement	HCC
2	Lobulated hypoechoic	Ill-defined hypodense	Minimal to mild heterogeneous enhancement	Progressive heterogeneous enhancement	Progressive heterogeneous enhancement	HCC
3	Lobulated, heterogeneously hypoechoic internal hyperechoic	N/A	Non to minimal rim enhancement	Mild irregular rim enhancement	N/A	IHCC
4	Ill-defined hypoechoic	heterogeneously hypodense	Irregular rim enhancement	Gradual centripetal enhancement	N/A	Hepatic abscess
5	Lobulated, heterogenoeusly hypo- and hyper-echoic	N/A	Peripheral enhancement	Gradual centripetal enhancement	Gradual centripetal enhancement	HCC
6	Lobulated hyperechoic	N/A	Irregular rim enhancement	Irregular rim enhancement	N/A	IHCC
7	Lobulated, heterogeneously hypoechoic internal hyperechoic	Ill-defined hypodense	Irregular peripheral enhancement	Gradual centripetal enhancement	Gradual centripetal enhancement	HCC
8	Ill-defined heterogenoeusly hypo- and hyper-echoic	Ill-defined hypodense	Irregular peripheral enhancement	Gradual centripetal enhancement	N/A	IHCC
9	Lobulated, heterogenoeusly hypo- and hyper-echoic	N/A	Irregular peripheral enhancement	Gradual centripetal enhancement	N/A	Lymphoma
10	Lobulated, heterogeneously hyperecmoic	N/A	Minimal rim enhancement	Rim enhancement	N/A	IHCC
11	Well-defined, heterogeneously hypoechoic	Lobulated hypodense	Irregular peripheral enhancement	Irregular peripheral enhancement	N/A	IHCC

CT: Computed tomography; HCC: Hepatocellular carcinoma; IHCC: Intrahepatic cholangiocarcinoma; N/A: Not applicable; Non-E: non-enhanced; US: Ultrasonography.