Paget's disease of the breast

Definition-Paget's (PAJ-uts) disease of the breast is a rare form of breast cancer, accounting for less than 5 percent of all breast cancers. Paget's disease of the breast starts in the breast ducts and extends to the skin of the nipple and to the dark circle of skin (areola) around the nipple. Paget's disease of the breast isn't related to Paget's disease of the bone, a metabolic bone disease.
Paget's disease of the breast occurs most often in women over age 50. Most women with Paget's disease of the breast have underlying infiltrating ductal breast cancer. Only in rare cases is the cancer confined to the nipple itself.

Paget’s disease of the breast is an eczema-like change in the skin of the nipple, and 9 out of 10 women who have this have an underlying breast cancer. The underlying breast cancer may be an invasive breast cancer or ductal carcinoma in situ (DCIS). In DCIS, the cancer cells are completely contained within the milk ducts.
Around half of the women who have Paget’s disease will have a breast lump that can be felt at the time it is diagnosed.
Paget’s disease occurs in about 1–2 out of every 100 women with breast cancer. It usually occurs in women in their 50s, but can occur at an younger or older age.
It can affect men, but this is extremely rare. It usually first appears as a scaly, red rash affecting the nipple and sometimes the dark area of skin surrounding the nipple (the areola). The rash always affects the nipple first, and may then affect the areola. It does not go away and may become sore. The area may bleed slightly.