Hypercalcaemia: An unusual complication of tuberculosis. A case report. Severe hypercalcaemia was observed in a seven year old Noumean boy with mediastinal lymph node tuberculosis. Many therapeutic manoeuvres were employed initially to obtain control of the serum calcium level, which finally responded to a course of indomethacin and remained stable on prednisone and antituberculous drug therapy. It has been postulated that the hypercalcaemia is due to increased sensitivity to Vitamin D, as seen in patients with sarcoidosis, but it is suggested that prostaglandin secretion from the inflammatory tissue may contribute to the hypercalcaemia.