We report a case of hypercalcaemic crisis due to sarcoidosis in a 15-y
ear-old boy. The clinical suspicion of sarcoidosis was confirmed by a
liver biopsy. At admission serum calcium, 1,25(OH)2 and ACE were eleva
ted and iPTH was suppressed. The levels of serum total and ionized cal
cium, iPTH, ACE, 1,25-(OH)2 and 25-OH were followed and chest X-ray an
d pulmonary function tests were performed during systemic steroid trea
tment. The clinical condition improved during treatment and the paracl
inical measurements normalised within 5 weeks. The mechanism whereby h
ypercalcaemia occurs in childhood sarcoidosis is clarified.