Hepatic focal nodular hyperplasia in children: Imaging features on multi-slice computed tomography

Table 1 The multi-slice computed tomography findings of the 12 pediatric focal nodular hyperplasia cases

Case	Sex/age (yr)	Location/size (cm × cm)	Margin	Central scar	Fibrous septa	Pseudocapsule	Precontrast/HAP/PVP/EP	Spoke-wheel pattern	Draining vein
1	M/18	S4/5.2 × 3.7	Well-circumscribed	+	+	-	Hypo/hyper/iso/iso	+	Hepatic vein
2	M/4	S5/4.3 × 3.2	Well-circumscribed	+	+	-	Hypo/hyper/hyper/iso	-	Hepatic vein
3	M/2	S5/5.5 × 5.2	Well-circumscribed	+	+	+	Hypo/hyper/hyper/slight hyper	+	Hepatic vein
4	F/14	S1/4.3 × 3.0	Well-circumscribed	-	+	-	Hypo/hyper/iso/iso	+	Not identified
5	M/16	S5,S6/ 12.9 × 10.1	Well-circumscribed	+	+	-	Hypo/hyper/hyper/iso	+	Hepatic vein
6	F/4	S4/4.5 × 3.7	Well-circumscribed	+	+	-	Slight hypo/hyper/hyper/iso	+	Hepatic vein
7	M/16	S6,S7/4.1 × 3.2	Well-circumscribed	-	-	-	Slight hypo/hyper/iso/iso	-	Not identified
8	F/16	S4/5.5 × 3.8	Well-circumscribed	+	+	-	Slight hypo/hyper/iso/iso	+	Hepatic vein
9	M/16	S6/6.5 × 5.2	Ill-defined margin	+	+	-	Hypo/hyper/iso/iso	+	Hepatic vein
10	F/17	S6/4.2 × 3.6	Ill-defined margin	+	+	-	Hypo/hyper/iso/iso	+	Not identified
11	M/18	S7/4.0 × 4.0	Well-circumscribed	+	+	-	Hypo/hyper/hyper/iso	+	Not identified
12	M/4	S8/4.8 × 4.5	Well-circumscribed	+	+	-	Slight hypo/hyper/iso/iso	-	Hepatic vein

HAP: Hepatic arterial phase; PVP: Portal venous phase; EP: Equilibrium phase; M: Male; F: Female.