Feature	Benign, (n = 62)		Malignant (n = 16)	Sensitivity %	Specificity %	PPV %	NPV %
Hypoechogenicity	Present	11	10
Hypoechogenicity	Absent	51	6	62	82	47	89
Halo sign	Present	11	0
Halo sign	Absent	51	16	0	82	0	76
microcalcifications	Present	5	7
microcalcifications	Absent	57	9	44	92	58	77
Intranodular blood flow	Present	15	11	69	77	42	90
Intranodular blood flow	Absent	47	5
A/T ≥1	Present	10	12
A/T ≥1	Absent	52	4	75	83	54	90
Blurred margins	Present	2	3
Blurred margins	Absent	62	13	18.7	97	60	82.2