Paget's disease

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A disease, occurring chiefly in old age, in which the bones become enlarged and weakened, often resulting in fracture or deformation.
• noun A form of breast cancer affecting the areola and nipple.
• noun A skin cancer arising from apocrine sweat glands.

from The Century Dictionary.

• noun Eczema about the nipple, terminating in carcinoma.
• noun Arthritis and osteitis deformans.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun pathology The bone disease osteitis deformans.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a disease of bone occurring in the middle aged and elderly; excessive bone destruction sometimes leading to bone pain and fractures and skeletal deformities