TOPICS: Lysosomes, lysosomal enzymes, sphingolipids, nerve tissue, Fabry disease, Niemann-Pick disease, Tay-Sachs disease, Gaucher disease, Krabbe disease, metachromatic leukodystrophy, arylsulfatase A, cerebroside sulfate, galactocerebrosidase, galactocerebroside, glucocerebrosidase, glucocerebroside, hexosaminidase A, GM2 ganglioside, sphingomyelinase, sphingomyelin, alpha-galactosidase A, ceramide trihexoside, cherry-red spot, autosomal recessive, weakness, lipid-laden macrophages, hepatosplenomegaly, foam cells, angiokeratoma, X-linked recessive