I had my Vit D levels checked by another lab - they were in the normal range so my low levels were an artifact of faulty testing. As all my other biochemistry (particulalrly calcium and phosphate) was normal I haven't had any further checks on the low PTH result. Hypoparathyroidism may be due to a variety of conditions and may be persistent, progressive, or transient. My advice would be for your daughter to be retested at regular intervals and perhaps to seek a second opinion. My low Vit D was only picked up because I changed my GP. Hope this helps.