Paget's disease

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Paget's disease (paj-its) n.
1. a chronic disease of bones, occurring in the elderly and most frequently affecting the skull, backbone, pelvis, and long bones; affected bones become thickened. There are often no symptoms, but pain, deformity, and fracture can occur. Medical name: osteitis deformans.

2. a malignant condition of the nipple, resembling eczema in appearance, that is associated with underlying infiltrating cancer of the breast. [ Sir J. Paget (1814–99), British surgeon]