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Many of these diseases are genetic. Sometimes the cause is a medical condition such as alcoholism, a tumor, or a stroke. Other causes may include toxins, chemicals, and viruses. Sometimes the cause is not known. Degenerative nerve diseases include. 1  Alzheimer's disease. 2  Amyotrophic lateral sclerosis.
Degenerative Joint Disease And Degenerative Disc Disease. Degenerative Joint Disease (DJD) or osteoarthritis is characterized by the breakdown of joint cartilage and may affect any joint in the body.