A: The variant NC_000020.11:g.18543167C>A in gene SEC23B is classified as 'Likely_benign' for Cowden_syndrome_7|Congenital_dyserythropoietic_anemia,_type_II. Molecular consequence: SO:0001819: synonymous_variant. Variant type: single_nucleotide_variant. Disease database links: MONDO:MONDO:0014802,MedGen:C4225179,OMIM:616858,Orphanet:201|MONDO:MONDO:0009134,MedGen:C1306589,OMIM:224100,Orphanet:98873. Review status: criteria provided, single submitter.