How is dx of PHPT?

Biochemically elevated Ca and PTH, should be adjusted for albumin, some pt may present normocalcemic w/in continuoum of the disease, also PTH may be normal inappropriately to high Ca, Vitamin D seen for deficiency may lead to elevated PTH, so before dx we need to replete vitamin D. Other labs (Ph, creatinine clearance, 24-hour urine calcium, family hx sus of FHH - urine caclium <100 and clearance <0.01, bone densitometry recommended)