What is the color of malignant breast masses (when biopsied)?

Tan-white.: Compared to the surrounding normal breast tissue, which is pink and yellow-white, malignant breast tumors are typically tan-white in color and very firm to the touch. They grossly have an irregular, stellate (star-like) appearance, and may be gritty when cut. The tissue fixation in formalin typically used in breast biopsies will enhance the differences between the tumor and the normal breast.