Which? Paget's disease of bone is a relatively benign and self-limited condition which can sometimes cause pain and in the worst case, deformity or fragility. But paget's disease of the breast is often a manifestation of an underlying breast cancer, which can certainly be fatal if untreated.
Whcich one? There are paget's diseases 1. Paget disease of the bone (not cancer-not fatal) 2. Paget's disease of the breast: a form of cancer involving the skin of the nipple. Survival depends on how advanced it is at diagnosis 3. Paget's disease in other sites of the body, usually the skin around the anus and genital areas: a form of cancer with a prognosis depending on how advanced it is at diagnosis.