Paget’s disease of the breast is a condition that causes an eczema-like change to the skin of the nipple. Nine out of 10 women who have Paget’s disease (90%) will also have breast cancer. The underlying breast cancer may be ductal carcinoma in situ (DCIS) or an invasive breast cancer. In DCIS, the cancer cells are completely contained within the milk ducts. Invasive breast cancer starts in the ducts or lobes of the breast, and spreads into surrounding breast tissue. It may help to read our information about breast cancer and ductal carcinoma in situ (DCIS).
Paget’s disease affects about one to two out of every 100 women with breast cancer (1–2%). It's most common in women aged 50 or over, but can occur at a younger age. It can affect men, but this is extremely rare.