Pompes sygdom tilhører de lysosomale aflejringssygdomme, idet den skyldes en mangel på en naturligt forekommende lysosomal hydrolase, sur α- glukosidase (GAA), der nedbryder lysosomal glykogen til glukose.
Pompe disease belongs to the lysosomal storage disorders as it is caused by a deficiency of a naturally-occurring lysosomal hydrolase, acid α - glucosidase (GAA) that degrades lysosomal glycogen to glucose.