Next-generation sequencing identified homozygous deletions, deleterious mutations, or both in DNA-repair genes--including BRCA1/2, ATM, Fanconi's anemia genes, and CHEK2--in 16 of 49 patients who could be evaluated (33%)...Patient 26, who had a somatic homozygous deletion of both BRCA1 and FANCA, had a response...