disease has basis in disruption of disease caused by disruption of alpha-N-acetylgalactosaminidase activity disease alpha-N-acetylgalactosaminidase deficiency https://www.malacards.org/card/schindler_disease icd11.foundation:1647881428 ICD9:277.89 disorder of alpha-N-acetylgalactosaminidase activity GARD:0016621 Alpha-N-acetylgalactosaminidase (NAGA) deficiency is a very rare lysosomal storage disease that is clinically and pathologically heterogeneous and is characterized by deficient NAGA activity. Orphanet:3137 NAGA deficiency Schindler disease alpha-N-acetylgalactosaminidase activity disease SCTID:238048001 NANDO:1200134 DOID:0112317 NORD:1693 MEDGEN:1845666 MONDO:0017779 UMLS:C5848084 oligosaccharidosis