Further laboratory tests confirmed hypercalcemia (corrected calcium level, 11.1 mg/dL [normal, 8.5–10.5 mg/dL]), high serum levels of parathyroid hormone-related protein (PTHrP, 8.3 gmol/L [normal, < 1.1 pmol/L]), and normal Intact PTH levels. This evidence concerns the gene PTHLH and Hypercalcemia.