A: The variant NC_000019.10:g.39507132C>T in gene DLL3 is classified as 'Uncertain_significance' for Spondylocostal_dysostosis_1,_autosomal_recessive. Molecular consequence: SO:0001583: missense_variant. Variant type: single_nucleotide_variant. Disease database links: MONDO:MONDO:0020692,MedGen:CN032975,OMIM:277300,Orphanet:2311. Review status: criteria provided, single submitter.