We compared aCGH data from our Brca1Δ/Δ;p53Δ/Δ, Brca2Δ/Δ;p53Δ/Δ and p53Δ/Δ tumor groups with aCGH data from previously published BRCA1-mutated, BRCA2-mutated and control human breast cancers [22,23]. The gene discussed is BRCA2; the disease is breast cancer.