In the long-term follow-up (more than 1 year), one patient (0.28%) suffered from manifest permanent hypoparathyroidism, i. e., subnormal PTH and calcium levels with the need for supplementation, but ten patients (2.8%) had latent permanent hypoparathyroidism or parathyroid insufficiency, i. e., PTH levels in the lower normal range and hypocalcemia with or without symptoms and with or without the need for calcium or vitamin D substitution. Here, PTH is linked to hypoparathyroidism.