Chronic syndrome of inappropriate secretion of antidiuretic hormone in childhood.

Chronic forms of the syndrome of inappropriate secretion of antidiuretic hormone (SIADH) occur infrequently in childhood. We describe three pediatric patients with chronic SIADH. In two patients the persistent SIADH was associated with neoplasms of the central nervous system while in the third patient it was due to congenital anomalies of the central nervous system. We describe the clinical course and management of each patient, including the long-term use of furosemide taken orally once a day.