Glycogen storage disease due to acid maltase deficiency, infantile onset is the most severe form of glycogen storage disease due to acid maltase deficiency, characterized by cardiomegaly with respiratory distress, muscle weakness and feeding difficulties. It is often fatal. The disease is MONDO_0017694 (glycogen storage disease due to acid maltase deficiency, infantile onset). Also known as: GSD due to acid maltase deficiency, infantile onset, GSD type 2, infantile onset, GSD type II, infantile onset, Pompe disease, infantile onset, alpha-1,4-glucosidase acid deficiency, infantile onset, glycogen storage disease type 2, infantile onset, glycogen storage disease type II, infantile onset, glycogenosis due to acid maltase deficiency, infantile onset.