“Fibrocystic disease” is the wastebasket term for benign breast disease characterized by fibrosis, cysts, inflammation, and a host of other benign changes. General • Benign lesion that is the cause of most breast lumps found in younger women of reproductive years (age 30-menopause) • Fibrocystic changes of the breast are NONPROLIFERATIVE and have NO increased risk of cancer in and of themselves. • Atypical hyperplasia (ductal or lobular) can mean there is an adjacent in situ or invasive cancer