A: The variant NC_000019.10:g.48985621del in gene GYS1 is classified as 'Likely_benign' for Glycogen_storage_disease_due_to_muscle_and_heart_glycogen_synthase_deficiency|not_specified. Molecular consequence: SO:0001627: intron_variant. Variant type: Deletion. Disease database links: MONDO:MONDO:0012693,MedGen:C1969054,OMIM:611556,Orphanet:137625|MedGen:CN169374. Review status: criteria provided, multiple submitters, no conflicts.