Hypocalcemia and hyperphosphatemia after phosphate enema use in a child.

The authors present a 3-year-old girl in whom severe hyperphosphatemia and hypocalcemia developed after the administration of three adult-sized hypertonic phosphate enemas. The commonly held notion that these enemas are not absorbed and therefore are systemically inactive is incorrect. With early intervention and treatment, the child survived without sequelae despite a serum phosphate level (74.7 mg/dL) that is greater than those previously reported. The treatment of hyperphosphatemia is reviewed as well as underlying pathology such as altered gastrointestinal motility and renal insufficiency, which may predispose the patient to this problem. Physicians should be aware of the possible adverse effects that can be caused by hypertonic phosphate enemas.