Table 2. Sensitivity and specificity of ultrasound and MRI.

	Se	Sp	PPV	NPV	Exact diagnosis
	%, (CI)	%, (CI)	%, (CI)	%, (CI)	%, (CI)
Ultrasound	100	37.5	72.2	100	76.2
n = 42	(87.1–100)	(18–61)	(56–84)	(61–100)	(61–86)
MRI	76.9	50	71.4	57	66.7
n = 42	(58–89)	(28–72)	(52.9–84.7)	(32.6–79)	(51–79)
P * McNemar test	0.03	0.6			NS

Se  =  sensitivity, Sp  =  specificity, PPV  =  predictive positive value, NPV  =  negative predictive value.