In the preoperative work-up, all patients had a high level of PTH (median 432 pg/mL, IQR 296.5 – 877) and hypercalcemia (median value 11.20 mg/dL, IQR 11-14.30) except for one female patient with a value of 8.8 mg/dL, whose PC was discovered during a total thyroidectomy for a thyroid goitre. This evidence concerns the gene PTH and goiter.