Steven R. Henderson, MD

Solitary intraductal papillomas are tumors of the major lactiferous ducts. They occur most frequently in women 30 to 40 years of age, and frequently present with nipple discharge.

Sclerosing adenosis most commonly occurs as multiple microscopic foci, although occasionally it presents as a palpable mass.

Fibroadenomas are the most common benign solid tumors of breast tissue. They may develop at any time after puberty, but they are found most frequently in women in their 20s and 30s and are more common than cysts among women aged 25 or younger.

Gross cysts (palpable fluid-filled macrocysts) are the most common lumps found in the breast. Cysts vary tremendously in size and number and may be microscopic or macroscopic.