Cornstarch therapy in a patient with type III glycogen storage disease.

A child with type III glycogen storage disease is described. The patient presented with growth failure and hepatic dysfunction, and no clinical or biochemical evidence of myopathy. Institution of high protein nocturnal intragastric feedings was associated with improved growth and less hepatic dysfunction. Compliance with tube feedings was sporadic necessitating another approach to the patient's management. The use of oral cornstarch supplements enabled the child to maintain normoglycemia and was associated with clinical and biochemical improvement. Our experience with this child suggests cornstarch therapy may be useful in those patients with type III glycogen storage disease who suffer primarily from hepatic dysfunction and growth failure.