secondary hyperparathyroidism
"I have severe bone pain in my legs and frequent bowel movements up to fifteen times per day. Parathyroid scan showed nothing abnormal. After taking Sensipar only three days I saw marked improvement. After 28 day trial, pain in the legs is 80% improved, (am a multiply operated spine patient so did not expect 100%).  Bowel movements are more normal and once per day as they should be. This shows with just one month of treatment, that I do have parathyroid disease that was not picked up on scans. Now I can pursue treatment through surgery."