SMPD1 and Lipid storage disease: The list includes most sphingolipidoses (ASAH1, GBA, GLB1, HEXA, HEXB, GM2A, PSAP, SMPD1), MPS (IDUA, SGSH, NAGLU, HGSNAT, GNS, ARSB, GUSB) and mucolipidoses (GNPTAB, GNPTG), as well as glycoproteinoses (MAN2B1, FUCA1, NEU1, CTSA), lipid storage diseases (LIPA), post‐translational modification defects (SUMF1), and lysosomal integral protein disorders (LAMP2, NPC1, NPC2, SCARB2, SLC17A5).