Table 3 Malignancy rates according to mTI-RADS category in patients coexistent with Hashimoto’s thyroiditis.

From: A Modified Thyroid Imaging Reporting and Data System (mTI-RADS) For Thyroid Nodules in Coexisting Hashimoto’s Thyroiditis

mTI-RADS category

Risk score (RS)

No. of thyroid malignancy

No. of total nodules

Malignancy rate (%)

3 (very low risk)

0 ≤ RS < 1.5

2

54

3.7

4a (low risk)

1.5 ≤ RS < 3

36

187

19.3

4b (moderate risk)

3 ≤ RS < 4.5

37

97

38.1

4c (high risk)

4.5 ≤ RS < 6

47

75

62.7

5 (very high risk)

6 ≤ RS

16

17

94.1

  1. Note – mTI-RADS, modified thyroid imaging reporting and data system.
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