Consistently High Ionized Calcium
My ionized calcium has been tested 4 times in the last 4 months and every time it has been out of range. In addition, I have osteopenia, low vitamin D, a lump in my neck and joint/bone pain. However, my serum calcium is up and down and my PTH is normal. Doctors haven't been able to explain much. Any ideas beside hyperparathyroidism? I'm a 52-year-old male.