Cases in group FA-D1 (mutated in BRCA2) and FA-N (mutated in PALB2) present with a distinct, relatively severe, phenotype that is characterized by the development of leukemia at very young age (median 2.2 years) and by pediatric cancers such as nephroblastoma (Wilms tumor) or medulloblastoma [40–44]. This evidence concerns the gene BRCA2 and Wilms tumor.