PTH and Hypercalcemia: Laboratory tests revealed creatinine within reference values, with abnormalities in phosphocalcium metabolism: hypercalcemia with plasma phosphate at the lower limit for her age and a low tubular phosphate reabsorption rate (TPR), elevated 1,25-(OH)2D3 and low PTH, variable calcium in the urine, and elevated glomerular filtration rate (GFR) and elevated urinary volume per 100 mL of glomerular filtrate (V/GF) (Table 1).