Table 1. Magnetic Resonance Imaging Features in 20 Patients With IGM.
| Characteristic | Number |
|---|---|
| Total number of breasts involved with IGM | 20 |
| Total number of lesions | 29 |
| Mass lesions | 14 |
| Shape | |
| Round | 9 |
| Oval | 5 |
| Margin | |
| Smooth | 11 |
| Irregular or spiculated | 3 |
| Mass enhancement | |
| Homogeneous | 3 |
| Heterogeneous | 1 |
| Rim enhancement | 10 |
| Non-mass enhancement | 15 |
| Distribution | |
| Segmental | 6 |
| Regional | 4 |
| Diffuse | 3 |
| Linear | 2 |
| Internal enhancement | |
| Homogeneous | 3 |
| Heterogeneous | 8 |
| Clumped or confluent | 4 |
Abbreviation: IGM: Idiopathic granulomatous mastitis.