RAD51C and Friedreich ataxia: Remarkably, germline bi-allelic and mono-allelic loss-of-function mutations in four of these genes cause FA and BrCa, respectively: FANCD1/BRCA2 [7,8], FANCJ/BRIP1 [9-12], FANCN/PALB2 [13-15], and the recently identified FA-like/BrCa mutated gene FANCO/RAD51C [3,4].