Review Article
Benign and Suspicious Ovarian Masses—MR Imaging Criteria for Characterization: Pictorial Review
Table 1
MRI Criteria for benign and suspicious adnexal lesions.
| | Benign | Malignant |
| Principal criteria | | | Size | <4 cm | >4 cm | Solid components | No | Solid part of the mass with heterogeneous enhancement pattern | Cystic mass | Simple | With vegetation and internal structures | Thickness of wall or septa | <3 mm | >3 mm | Lobulated mass | No | Yes | Calcifications | Wall of cyst, dense | Tiny amorphic | Necrosis | No | Yes | Papillary projections | No | Yes, with heterogeneous enhancement pattern | Tumor vessels | No | Yes, with heterogeneous enhancement pattern |
| Additional criteria | | | Lymph nodes | Normal (short axis <1 cm) | Enlarged (short axis >1 cm) | Peritoneal implants | No | Yes |
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