Category: Electrolytes

Simple steps to work up hypercalcemia: If PTHi high then follow work up for Hyperpaprathyroidism If PTHi normal then order 24 hour urine calcium and creatinine (Fractional excretion of Calcium) PTHrP TSH SPEP, UPEP, Serum light chains 25-hydroxy Vitamin D 1,25 hydroxy Vitamin D (consider lymphoma, sarcoid, TB) Other rare cause Vitamin A Thyroid