Eighteen percent of patients (N=9) developed postoperative hypocalcemia (three patients (6%) were symptomatic); postoperative serum calcium ranged from 3.5 to 5.6 (4.8±0.6), and postoperative PTH ranged from 2 to 52 pmol/L (22.2±10.1). Here, PTH is linked to Hypocalcemia.