Fortuitously discovered liver lesions

Table 3 Ultrasound findings in 424 patients with focal nodular hyperplasia and 36 patients with hepatocellular adenoma

	Focal nodular hyperplasia	Hepatocellular adenoma
	(n = 424)	(n = 36)
Size of lesion, mm (range)	49 ± 24 (12-110)	34 ± 22 (20-120)
Conventional B-mode ultrasound
Echo texture
Hypoechoic	361	81
Isoechoic	382	20
Hyperechoic	6	8
Central scar	241	0
Colour/power Doppler imaging
Hypervasular	369	33
Radial vascular architecture	234	3
Contrast-enhanced ultrasound
Arterial phase enhancement	424	36
(Early) Portal venous phase enhancement	406	6

¹Depending on the technique and ultrasound machine used; all in a sonographically bright liver. Reproduced with permission from Dietrich et al[66].