Focal liver lesions in cirrhosis: Role of contrast-enhanced ultrasonography

Table 4 Imaging enhancement pattern of benign focal liver lesions on contrast-enhanced ultrasound

Lesion	Arterial phase	Portal venous phase	Late phase	Post-vascular phase
Hepatic cysts	Non-enhance	Non-enhance	Non-enhance	Non-enhance
Cystic hydatid disease	Non-enhance cysts and septa	Non-enhance cysts and septa	Non-enhance cysts and septa	Non-enhance cysts and septa
Abscess	Rim-enhance with enhanced septa; no central enhancement	Rim-enhance with enhanced septa; no central enhancement	Hypo-enhance rim; no central enhancement	Hypo-enhance rim; no central enhancement
Hemangioma	Peripheral, discontinuous and globular hyper-enhance	Peripheral, globular iso enhance and fill-in	Iso-enhance or hypo-enhance	Iso-enhance or hypo-enhance
FNH	Hyper-enhance from the center to peripheral region spoke-wheel vascularity	Hyper-enhance with/without un-enhanced central scar	Iso-enhance or hyper-enhance with/without un-enhanced central scar	Iso-enhance or hypo-enhance
HA	Hyper-enhance	Iso-enhance	Iso-enhance	Iso-enhance or hypo-enhance
Pseudo lesions	Hyper-enhance	Hyper-enhance or iso-enhance	Iso-enhance	Iso-enhance

FNH: Focal nodular hyperplasia; HA: Hepatocellular adenoma.