Table 2.
Analyzed features of US images.
| Shape | Oval |
| Round | |
| Irregular | |
| Orientation | Parallel |
| Non-parallel | |
| Margin | Circumscribed |
| Non-circumscribed | |
| Indistinct | |
| Micro/macrolobulated | |
| Angular | |
| Spiculated | |
| Echo pattern | Anechoic |
| Hyperechoic | |
| Complex cystic and solid | |
| Hypoechoic | |
| Isoechoic | |
| Heterogeneous | |
| Postrior features | No posterior features |
| Enhancement | |
| Shadowing | |
| Combined pattern | |
| Calcifications | Absent |
| In a mass | |
| Outside of a mass | |
| Intraductal | |
| Hyperechogenic foci | |
| Skin | Normal |
| Thickening > 2 mm | |
| Edema | Absent |
| Present | |
| Vascularity | Absent |
| Internal | |
| Vessels in a rim | |
| Outside of a mass | |
| Elastography | Soft < 80 kPa |
| Intermediate 80–160 kPa | |
| Hard > 160 kPa |