Ultrasound says a suspicious mass in my breast. it's fixed and bumpy, can move skin around it but not the mass. what are the chances this is cancer?

More: information about the specific ultrasound characteristics are needed. By definition, a lesion characterized as "suspicious" carries a 3-95% chance of malignancy(BIRADS category 4). This is a broad range, which can be narrowed down if all of the sonographic features are taken into account. It sounds like this will need a needle biopsy to make a diagnosis.