Fibroadenoma

(FY-broh-a-deh-NOH-muh) A benign (noncancerous) tumor that usually forms in the breast from both fibrous and glandular tissue. Fibroadenomas are the most common benign breast tumors.

(fi'bro-add ih no" muh) is a non-cancerous lump in the breast that feels smooth, round, and hard like a marble. It can be moved around easily in the breast tissue and is usually found close to the nipple, but can grow anywhere. These lumps do not cause harm by themselves and usually do not need to be taken out. (Go to Breast Pathology >)