This is due to higher PTH levels, increased bone turnover markers, lower bone mineral density, and increased parathyroid mass [2-5]. PHPT can be classified into symptomatic and asymptomatic forms, with both forms further divided into hypercalcemic primary hyperparathyroidism (HPHPT) and normocalcemic primary hyperparathyroidism (NPHPT). The gene discussed is PTH; the disease is primary hyperparathyroidism.