<qa>  What is the name of the type II of glycogen storage disease?Pompe disease also known as glycogen storage disease type II, GSD-II is caused by a deficiency of a critical enzyme in the body called acid alpha-glucosidase GAA. Normally, GAA is used by the bodys cells to break down glycogen a stored form of sugar within specialized structures called lysosomes. In patients with Pompe disease, an excessive amount of glycogen accumulates and is stored in various tissues, especially heart and skeletal muscle, which prevents their normal function. This study is being conducted to evaluate the safety and effectiveness of recombinant human acid alpha-glucosidase rhGAA as a potential enzyme replacement therapy for Pompe disease. Patients diagnosed with infantile-onset Pompe disease who are less than or equal to 6 months old will be studied. 