Table 4 Comparison between US findings in NFKD and BCL

Radiographic finding	NFKD		BCL		P value	Reference
Grouping of nodes (%)
Dominant mass	17	(n = 12)	73	(n = 44)	0.05	[14]
	36	(n = 25)	68	(n = 25)	0.04	[19]
	7	(n = 51)	0	(n = 63)	0.039	[23]
Clustered nodes	83	(n = 12)	27	(n = 44)	0.05	[14]
	64	(n = 25)	32	(n = 25)	0.04	[19]
	93	(n = 51)	100	(n = 63)	0.039	[23]
Suppuration (%)	17	(n = 12)	45	(n = 44)	0.3	[14]
	4	(n = 25)	36	(n = 25)	< 0.01	[19]
Irregular shape (%)	0	(n = 25)	36	(n = 25)	< 0.01	[19]
Ill-defined margin (%)	0	(n = 25)	36	(n = 25)	< 0.01	[19]
Echogenicity (%)
Homogeneous	88	(n = 25)	68	(n = 25)	0.17	[19]
Heterogeneous	12	(n = 25)	32	(n = 25)		[19]
Largest LN mean elasticity (kPa)	12.3 ± 2.8	(n = 47)	16.4 ± 2.5	(n = 56)	< 0.01	[22]

US: ultrasound; NFKD: node-first presentation of Kawasaki disease; BCL: bacterial cervical lymphadenitis.