PTH and secondary hyperparathyroidism: Here we present the case of a 50-year-old Caucasian male patient with ESRD secondary to hypertension who had thrice-weekly dialysis for the preceding six years in addition to secondary hyperparathyroidism with pre-admission blood tests: parathyroid hormone (PTH) 156 pmol/L, calcium 2.47 mmol/L, and phosphate 2.51 mmol/L (see Figure 1 for trend).