Symptomatic hypercalcemia and scarring alopecia as presenting features of sarcoidosis.

Sarcoidosis is a multisystem granulomatous disease most frequently affecting the lungs, lymph nodes, and eyes. Skin involvement occurs in approximately 25% to 35% of cases, with the scalp uncommonly affected. Abnormal calcium metabolism is associated with sarcoidosis and other granulomatous disorders and most commonly presents as hypercalciuria (40%-60%) and, less frequently, hypercalcemia (10%-20%). Symptomatic hypercalcemia is unusual, presenting in <5% of sarcoidosis patients, and rarely results in kidney damage. We report here a case of sarcoidosis presenting with severe symptomatic hypercalcemia (>14 mg/dL, 3.5 mmol/L), scarring alopecia, and acute-on-chronic kidney failure.