Predicting Neck Abscess with Contrast-Enhanced Computed Tomography

Table 4

Frequency of patients for each CECT diagnostic criterion.

CECT criteria	Number of patients
	True positive ()	False positive ()	True negative ()	False negative ()
Presence of inflammation
Yes	70	4	5	1
No	1		3
Presence of hypodense mass
Yes	71	4	4
No			4	1
Presence of rim enhancement
100%	50	0	2	0
≥50% but <100%	12	3	1	0
<50%	9	1	1	0
Not rim enhancement	0	0	4	1
Irregularity of rim enhancement
Yes	63	2
No	8	2	4
Not applicable			4
Presence of air
Total number of cases	10	1
Within collection only	8	1
Tracking within fascia only	1
Within collection, fascia and in bone	1
Lymph node enlargement
Total number of cases	54	4	6	0
Normal hilum	29	4	0	0
Abnormal hilum	25	0	6	0