The c.1748T>G (p.Leu583Trp) variant in PALB2 is a missense variant predicted to cause a substitution of leucine by tryptophan at amino acid 583 (p.Leu583Trp). This variant has a minor allele frequency in gnomAD v2.1.1 of 0.000044 in the non-Finnish European population (PM2_Supporting, BS1, and BA1 are not met). PALB2, in which the variant was identified, is defined by the HBOP VCEP as a gene for which primarily truncating variants are known to cause disease. In summary, this variant meets the criteria to be classified as a variant of uncertain significance for autosomal dominant hereditary breast and pancreatic cancer and autosomal recessive FANCN based on the ACMG/AMP criteria applied as specified by the HBOP VCEP. (BP1)