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. 2022 Sep 23;13:924993. doi: 10.3389/fendo.2022.924993

Table 2.

Preoperative ultrasound characteristics of patients with Bethesda category IV thyroid nodules (n = 132).

Surgery group (n = 84)
MWA group (n = 47) p
Benign lesions/FTA (n = 44) PTC (n = 27) FTC/FVPTC (n = 9)
Composition (n, %) < 0.05
Solid 23 (47.95%)* 32 (72.72%) 24 (88.9%) 7 (77.78%)
Cyst-solid 14 (29.79%)* 2 (4.54%) 3 (11.1%) 2 (22.22%)
Cystic 10 (21.28%)* 10 (22.72%) 0 0
Echogenicity (n, %) < 0.05
Hypoechoic 2 (4.26%)* 6 (13.64%) 16 (59.26%) 4 (44.44%)
Isoechoic/hyperechoic 45 (95.74%)* 38 (86.36%) 11 (40.74%) 5 (55.56%)
Margin (n, %) < 0.05
Regular 47 (100%) 38 (86.36%) 14 (51.85%) 5 (55.56%)
Irregular 0 6 (13.64%) 13 (48.15%) 4 (44.44%)
Calcification (n, %)
Microcalcification 7 (14.89%) 6 (13.64%) 6 (22.22%) 1 (11.11%)
Coarse/rim calcification 2 (4.26%) 9 (20.45%) 5 (18.52%) 3 (33.33%)
Absent 38 (80.85%) 29 (65.9%) 16 (59.26%) 5 (55.56%)
Shape
Taller-than-wide 0 1 (2.27%) 4 (14.81%) 0
Wider-than-tall 47 (100%) 43 (97.72%) 23 (85.19%) 9 (100%)
ACR TI-RADS < 0.05
TI-RADS 1 11 (23.40%)* 5 (11.36%) 2 (7.4%) 0
TI-RADS 2 6 (12.77%)* 2 (4.54%) 0 1 (11.11%)
TI-RADS 3 20 (42.56%)* 17 (38.63%) 6 (22.22%) 2 (22.22%)
TI-RADS 4 10 (21.28%)* 17 (38.63%) 8 (29.63%) 4 (44.44%)
TI-RADS 5 0 3 (6.8%) 11 (40.74%) 2 (22.22%)

MWA, microwave ablation; FTA, follicular thyroid adenoma; PTC, papillary thyroid carcinoma; FTC, follicular thyroid carcinoma; FVPTC, follicular variant of papillary thyroid carcinoma; ACR TI-RADS, the Thyroid Imaging Reporting and Data System of American College of Radiology.

*p < 0.05 vs. MWA group.