PTH and osteoporosis: His secondary osteoporosis screen reveals normal renal function with estimated glomerular filtration rate (eGFR) greater than 90 mL/min/1.73 m2 (≥60), corrected calcium 2.49 mmol/L (2.10-2.60 mmol/L), 25-hydroxyvitamin D 73 nmol/L (≥50), parathyroid hormone (PTH) 5 pmol/L (1.6-6.9 pmol/L), thyrotropin (TSH) 1.08 mIU/L (0.27-4.20 mIU/L), testosterone 21.1 nmol/L (10.0-30.0 nmol/L) with normal luteinizing hormone and follicle-stimulating hormone.