Table 1 Benign and malignant ultrasonic features used in simple ultrasound-based rules as proposed by Timmerman et al. [9]
10 Simple ultrasound-based rules | |
|---|---|
B-features (for predicting a benign tumor) | |
B1 | Unilocular |
B2 | Presence of solid components, of which largest solid component has largest diameter <7 mm |
B3 | Presence of acoustic shadows |
B4 | Smooth multilocular tumor with largest diameter <100 mm |
B5 | No blood flow (color score 1) |
M-features (for predicting a malignant tumor) | |
M1 | Irregular solid tumor |
M2 | Presence of ascites |
M3 | At least four papillary structures |
M4 | Irregular multilocular solid tumor with largest diameter ≥100 mm |
M5 | Very strong blood flow (color score 4) |