Pictorial review of hepatic echinococcosis: Ultrasound imaging and differential diagnosis

Figure 3 Contrast-enhanced ultrasound images of hepatic cystic echinococcosis. A: A 27-year-old female patient presenting with a liver lesion of hepatic cystic echinococcosis 1 (HCE1), exhibiting peripheral “rim-like” enhancement in the arterial phase (AP) on contrast-enhanced ultrasound (CEUS) (the yellow arrow), with no internal enhancement observed; B: A 41-year-old female patient presenting with a liver lesion of HCE2, exhibiting slightly peripheral “rim-like” enhancement in the AP on CEUS (the yellow arrow), with no internal enhancement detected; C: A 56-year-old female patient presenting with a liver lesion of HCE3a, exhibiting slightly peripheral “rim-like” enhancement in the AP on CEUS (the yellow arrow), with no internal enhancement observed; D: A 49-year-old male patient presenting with a liver lesion of HCE3b, exhibiting slightly peripheral “rim-like” enhancement in the AP on CEUS (the yellow arrow), with internal septal enhancement visible; E: A 47-year-old female patient presenting with a liver lesion of HCE4, exhibiting slightly peripheral “rim-like” enhancement in the AP on CEUS (the yellow arrow), with no internal enhancement observed; F: A 29-year-old female patient presenting with a liver lesion of HCE5, with no obvious enhancement in the AP, portal venous phase, or late phase.