Sir James Paget, a surgeon and pathologist, described several diseases, including: ...
(from the article `breast cancer`) Paget disease is an uncommon type of breast cancer that begins at the nipple and initially causes a burning, itching, or tender sensation. Eventually ... ...and was later vice president (1873–74) and president (1875) of the Royal College of Surgeons. He rendered excellent descriptions of breast ca...
<disease, rheumatology> This is a disease of bone that initially results in the excessive resorption of bone (by osteoclasts) followed by the replacement of normal bone marrow with vascular and fibrous tissue. ... Many patients are asymptomatic and diagnosed by routine X-rays. ... (13 Nov 1997) ... 
Osteitis deformans.
[n] - a disease of bone occurring in the middle aged and elderly
There are 2 different diseases that are called Paget's disease. One affects the skin around the nipple of the breast and looks a little like ezcema. It is mostly (but not always) a sign that there is a breast cancer in the area underneath.
a disorder occurring in the middle-aged and elderly in which bone does not form properly, causing bone weakening, thickening, and deformity 
osteitis deformans 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
Disease of excess bone removal and replacement with deformity.