The depth and duration of hypocalcaemia is reflected on the duration ofhospital stay, cost and patient satisfaction. With the current trend towardshorter hospital stay, it is very important to predict which patient mightdevelop severe postoperative hypocalcaemia. Different predictive factorswere highlighted by previous study.The aim of this study was to assessthe predictive factors of post parathyroidectomy severe hypocalcaemia inpatients with hyperparathyroidism