Solorzano et al1 performed a very important retrospective case study on 505 patients with hyperparathyroidism, with a mean follow-up of 41 months. They found that more than 33% of patients had elevated parathyroid hormone (PTH) levels after 6 months, though only 4.8% of them developed recurrent disease. This finding is extremely important for clinical practice.
Our group recently published a study2 about 10 children (of 790 patients treated in our department 1996-2007) with primary hyperparathyroidism. Although we monitored PTH levels in only 7 of these 10 children, we did not find any of them to have persistent postoperative elevation of PTH levels.
Šedý J. Elevation of Parathyroid Hormone Levels in Children Who Underwent Parathyroidectomy for Hyperparathyroidism. Arch Surg. 2009;144(1):92-93. doi:10.1001/archsurg.2008.515