Elevated serum level of calcium
Low serum phosphate level
Elevated serum chloride level
Elevated serum parathyroid hormone (PTH)
Elevated serum alkaline phosphatase
Elevated serum creatinine level
Blood urea nitrogen
Serum protein electrophoretic pattern
Bone studies
Radiography of bones (osteopenia)
Osteitis fibrosa cystica found on X rays (rare)
X ray of skull (ground glass appearance)
Ultrasound
C.T. scan of neck
Thallium 201 technetium - 99m subtraction scan
M.R.I.