A: The variant NC_000019.10:g.18128423G>A in gene MAST3 is classified as 'Uncertain_significance' for Inborn_genetic_diseases|Developmental_and_epileptic_encephalopathy_108. Molecular consequence: SO:0001583: missense_variant. Variant type: single_nucleotide_variant. Disease database links: MeSH:D030342,MedGen:C0950123|MONDO:MONDO:0859314,MedGen:C5774253,OMIM:620115. Review status: criteria provided, multiple submitters, no conflicts.