List of what causes osteoporosis and conditions for which osteoporosis symptoms are related. If you want to know, "Why do I have osteoporosis?" consider that osteoporosis can be caused by a number of illnesses. This is a list of diseases that osteoporosis is a symptom of, including diseases associated with osteoporosis. What diseases cause osteoporosis? List items range from Hyperparathyroidism to Hyperparathyroidism. This list of diseases with osteoporosis as a symptom is in alphabetical order with images when available, though it can also be sorted. If you could say "I am experiencing osteoporosis," please consult a physician.