Table 4. Neck CT findings of RPI-KD and bacterial RPA

Variables	RPI-KD		Bacterial RPA		References
Cellulitis or phlegmon (%)	100.01)	(n = 11)	80.6	(n = 36)	[12]
	81.81)	(n = 22)	44.1	(n = 34)	[13]
	100.0	(n = 10)	–		[15]
Suppuration or abscess (%)	0.01)	(n = 11)	44.4	(n = 36)	[12]
	45.51)	(n = 22)	85.3	(n = 34)	[13]
Ring enhancement (%)	0.01)	(n = 10)	100.0	(n = 16)	[11]
	0.01)	(n = 21)	88.9	(n = 18)	[14]
	0.0	(n = 10)	–		[15]
Mass effect (%)	4.71)	(n = 21)	61.1	(n = 18)	[14]

P < 0.01.
CT: computed tomography; RPI-KD: Kawasaki disease with retropharyngeal inflammation; KD: Kawasaki disease; RPA: retropharyngeal abscess.