How does a breast tumor look like?

Firm whitish tissue: A breast tumor is a mass of tissue that is firm and more dense than surrounding breast tissue. It is usually pale or white in color. The edges are usually irregular and can project into normal tissue.

Tumor: The word tumor means a growth. There are benign tumors and cancerous tumors. Benign breast tumors can be a fluid cyst or a firm solid rounded fibroadenoma. Cancerous breast tumors are firm and irregular and look abnormal on mammogram and breast ultrasound.