Explain to me why paget disease could cause abnormal pressure on a spinal nerve?

When an area of bone is destroyed in a person with Paget鈥檚 disease, the bone that replaces it is soft and porous. Soft bone can be weak and easily bend, leading to shortening of the affected part of the body. This can effect your bones in two ways. 1 - Shortening and bending will put additional pressure on the spinal cord effecting the pressure on the nerves. 2 - When the bone repairs itself it causes the bone to become larger, also creating more pressure on the spinal cord.

Paget's disease, otherwise known as osteitis deformans, is a chronic disorder that typically results in enlarged and deformed bones. It is named after Sir James Paget, the British surgeon who first described this disease. The excessive breakdown and formation of bone tissue that occurs with Paget's disease can cause bone to weaken, resulting in bone pain, arthritis, deformities, and fractures. Paget's disease may be caused by a slow virus infection (i.e., paramyxoviruses such as measles and respiratory syncytial virus), present for many years before symptoms appear. There is also a hereditary factor since the disease may appear in more than one family member.

Paget's disease is rarely diagnosed in people less than 40 years of age. Men are more commonly affected than women. Prevalence of Paget's disease ranges from 1.5 to 8 percent depending on age and country of residence. Prevalence of familial Paget's disease (where more than one family member has the disease) ranges from 10 to 40 percent in different parts of the world.Because early diagnosis and treatment is important, after age 40, siblings and children of someone with Paget's disease may wish to have an alkaline phosphatase blood test every 2 or 3 years. If the alkaline phosphatase level is above normal, other tests such as a bone-specific alkaline phosphatase test, bone scan, or x-ray can be performed.