How does a breast tumor look like in ultrasound?

Solid: Breast nodule with irregular edges can be a sign of concern. Benign cysts are fluid filled with well circumscribed edges. Benign fibrocystic nodules are solid with smooth edges.

Deeper than wide: Breast cancers on us usually have the appearance of being deeper than wide, are hypoechoic, indicating they are solid, and frequently have irregular borders. They are also not compressible.