Table 2:

Diagnostic accuracy of MR imaging in the detection of abscesses and deep extension (parapharyngeal, retropharyngeal involvement) in the abscesses^{^a}

MRI	Operation
MRI	Yes	No
Abscess
Yes	96	2
No	2	19^{^b}
Deep extension
Yes	36	5
No	6	57

↵a Sensitivity, 0.98; specificity 0.90; PPV, 0.98; negative predictive value, 0.90; accuracy, 0.97. In the complications, sensitivity, 0.88; specificity, 0.90; PPV, 0.86; negative predictive value, 0.92; accuracy 0.89.
↵b Conditions of 4 patients were surgically confirmed, and the diagnoses of 15 patients were based on clinical assessment.