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Table 2 Gray scale ultrasound features of thyroid nodules

From: A novel TIRADS of US classification

Grayscale features No. of malignant nodules (n = 275) No. of benign nodules (n = 1383) Malignant rate Benign rate
Composition
 Solid 255 805 0.614 0.386
 Mixed 20 578 0.148 0.852
 Cystic     
Margin
 Ill-defined 68 1262 0.213 0.787
 Microlobulated 115 106 0.845 0.155
Shape
 Irregular 92 15 0.968 0.032
Calcification
 Micro-calcification 111 51 0.916 0.084
 Macro-calcification 67 179 0.653 0.347
 No-calcification 97 1153 0.297 0.703
Taller than wide
 <= 1 134 1326 0.337 0.663
 > 1 141 57 0.926 0.074