A: The variant NC_000019.10:g.18147001_18147018dup in gene MAST3 is classified as 'Uncertain_significance' for not_provided. Molecular consequence: SO:0001575: splice_donor_variant,SO:0001821: inframe_insertion. Variant type: Duplication. Disease database links: MedGen:C3661900. Review status: criteria provided, single submitter.