Table 2.

Adnexal masses in pregnancy: benign versus malignant features (International Ovarian Tumor Analysis (IOTA) Group Simple Rules) [32].

B-Features	M-Features
B1- Unilocular	M1- Irregular solid tumor
B2- Presence of solid components with a largest diameter of <7 mm	M2- Presence of ascites
B3- Presence of acoustic shadows	M3- At least 4 papillary structures
B4- Smooth multilocular tumor with a largest diameter of <100 mm	M4- Irregular multilocular-solid tumor with a largest diameter of ≥100 mm
B5- No blood flow (color score 1)	M5- Very strong blood flow (color score 4)