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Paget's disease of the nipple, also called Paget's disease of the breast, is an uncommon type of cancer that forms in or around the nipple (1, 2, 3). More than 95 percent of people with Paget's disease of the nipple also have underlying breast cancer; however, Paget's disease of the nipple accounts for less than 5 percent of all breast cancers (1). For instance, of the 211,240 new cases of breast cancer projected to be diagnosed in 2005, fewer than 11,000 will also involve Paget's disease of the nipple (4).
Most patients diagnosed with Paget's disease of the nipple are over age 50, but rare cases have been diagnosed in patients in their 20s (1). The average age at diagnosis is 62 for women and 69 for men. The disease is rare among both women and men.
Paget's disease of the nipple was named after Sir James Paget, a scientist who noted an association between changes in the appearance of the nipple and underlying breast cancer (1, 5). There are several other unrelated diseases named after Paget, including Paget's disease of the bone and Paget's disease of the vulva; this fact sheet discusses only Paget's disease of the nipple.
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