PTH and Hypercalcemia: The biochemical evaluation was consistent with PTH-dependent hypercalcemia with a total serum calcium of 11.0 mg/dL (2.75 mmol/L, reference 8.6-10.3 mg/dL), albumin 4.6 g/dL (reference 3.6-5.1 g/dL), concurrent PTH 111 pg/mL (reference 14-64 pg/mL), and 25OHD 16 ng/mL (39.94 nmol/L, reference 30-100 ng/mL).