@hopeful33250 Teresa, my mom had parathyroid surgery 4 years ago at age 85. Yes, she also had osteoporosis and thin bones and the parathyroid problem was pulling calcium out of her bones in spite of prescriptions for hardening bones. They tracked calcium levels for several months before it was bad enough to operate, and she had some cognitive issues because of it that got better after parathyroid surgery. We got her through the surgery, and a week later she fell and broke her pelvis, her foot and her ankle which changed everything and contributed to the disability that she now has. I was there when it happened. I didn't see her feet during the fall, but I suspect that either she twisted her ankle, or the bone fractured in her foot when she stepped on it causing the fall. In time, the foot and pelvis fractures caused her foot to twist after it healed and it got to where she could not straighten it and stand on it because all the tendons shortened. There was surgery for that and the Achillles tendon was lengthened by cutting it and splicing it back together, and a few muscle attachments on the foot were moved. She can't walk well and uses a wheel chair now. We are awaiting the results of a bone density scan from this past week.