metachromatic leukodystrophy due to saposin B deficiency https://github.com/monarch-initiative/mondo/issues/4521 https://github.com/monarch-initiative/mondo/issues/6019 https://rarediseases.info.nih.gov/diseases/10674/metachromatic-leukodystrophy-due-to-saposin-b-deficiency https://www.malacards.org/card/metachromatic_leukodystrophy_due_to_saposin_b_deficiency OMIM:249900 MEDGEN:120624 SCTID:68390005 MESH:C562609 NANDO:1200082 metachromatic leukodystrophy due to sap-B deficiency NANDO:2201205 SCTID:297278001 MONDO:0009590 GARD:0010674 metachromatic leukodystrophy due to saposin b deficiency UMLS:C0268262 SCTID:1003375005 metachromatic leukodystrophy PSAP-related sphingolipidosis