Table 1 Distribution of US characteristics in malignant and benign thyroid lesions; p values indicating a statistical significance are marked by bold
Parameter | No. of cases (%) | Malignant lesions | Benign lesions | p value |
|---|---|---|---|---|
No. of cases (%) | No. of cases (%) | |||
Vascularity | Â | Â | Â | Â |
Intranodular and increased or completely absent | 150 (75.0) | 96 (64.0) | 54 (46.0) | <0.0001 |
Peripheral, subcapsular | 50 (25.0) | 4 (8.0) | 46 (92.0) | Â |
Microcalcifications | Â | Â | Â | Â |
Positive | 128 (64.0) | 93 (72.7) | 35 (27.3) | <0.0001 |
Negative | 72 (36.0) | 7 (9.7) | 65 (90.2) | Â |
Orientation | Â | Â | Â | Â |
Taller-than-wide | 88 (44.0) | 86 (97.7) | 2 (2.3) | <0.0001 |
Wider-than-tall or of other shape | 112 (56.0) | 14 (12.5) | 98 (87.5) | Â |
Composition | Â | Â | Â | Â |
Solid | 173 (86.5) | 94 (54.3) | 79 (65.7) | 0.0032 |
Mixed | 27 (23.5) | 6 (22.2) | 21 (77.8) | Â |
Echogenicity | Â | Â | Â | Â |
Hypoechogenic | 106 (53.0) | 84 (79.2) | 22 (20.1) | <0.0001 |
Isoechogenic | 94 (47.0) | 16 (17.0) | 78 (83.0) | Â |
Margins | Â | Â | Â | Â |
Irregular | 107 (53.5) | 77 (71.9) | 30 (28.1) | <0.0001 |
Well circumscribed | 93 (46.5) | 23 (24.7) | 70 (75.3) | Â |
Peripheral Halo | Â | Â | Â | Â |
Absent or irregular, thick | 111 (55.0) | 76 (68.0) | 35 (32.0) | <0.0001 |
Present, thin and regular | 89 (45.0) | 24 (27.0) | 65 (73.0) | Â |