Yes, you are right, @debs4246. The problematic parathyroid glands often do not show up on the nuclear scan. Many on Connect have reported that. Having an ultrasound of the neck done on routine basis (mine are done every six months) tends to be a less expensive way to monitor the parathyroid. Even then, it is sometimes just a guess.

How are you feeling? Any other symptoms such as osteoporosis, kidney stones, etc.?