Are malignant breast lumps usually movable?

Yes: While the "classic" description of a breast cancer is "fixed" and "immovable", I have found many palpable breast cancers to be movable within the breast. The bottom line is that when a woman finds a new lump in her breast, she should seek out medical attention for further evaluation regardless of its mobility within the breast.

Early on: As they grow they may attach to more tissue, muscle, or chest wall, making them more difficult to remove !