A systematic review and meta-analysis recently analysed 188 studies on the definition and early diagnosis of hypoparathyroidism; it found that postoperative PTH measurements within 24 h had higher sensitivity and specificity than intraoperative PTH for predicting hypoparathyroidism, thresholds of <10 pg/ml and <15 pg/ml were both reliable for identifying patients at risk, no specific time point within the first 24 h (for example 1 h, 6 h versus 12 h versus 24 h) was superior, and any measurement within postoperative day 1 (POD1) was effective7. This evidence concerns the gene PTH and hypoparathyroidism.