# of Suspicious US Features

TIRADS Category

Risk

% Risk of Maglignancy

0

3

Probably Benign

1.7

1

4a

Low suspicion for malignancy

3.3

2

4b

Intermediate suspicion for malignancy

9.2

3 or 4

4c

Moderate concern but not classis for malignancy

44.4 - 72.4

5

5

Highly suggestive of malignancy

87.5