Table 1. Performance values of MRI and fine-needle aspiration cytology (FNAC) for differentiating benign from malignant parotid masses.

Diagnostic performance	MRI	FNAC*
Accuracy (%)	23/24 (96)	19/20 (95)
Specificity (%)	19/19 (100)	16/16 (100)
Sensitivity (%)	4/5 (80)	3/4 (75)
Negative predictive value (%)	18/19 (94.7)	16/17 (94)
Positive predictive value (%)	4/4 (100)	3/3 (100)

*Ratios for FNAC based on biopsy with adequate material