One woman was diagnosed with lymphoma with a prior ductal BC, and she had a heterozygous BRCA2 c.1763_1766delATAA, p.Asn588Serfs*25; the other one had three cancers, thyroid, gastric, and ductal BC harboring an ATM c.5496 + 2_5496 + 5delTAAG, a likely pathogenic mutation. This evidence concerns the gene ATM and lymphoma.