RAD51C and hypoparathyroidism-retardation-dysmorphism syndrome: This included 4 patients with BRCA1, one with BRCA2, one with RAD51C, one with BRIP1, and one with CHEK2. When performing NGS testing, there were 3 somatic BRCA 1/2 mutations (one of them also had germline mutation) and 3 somatic BRIP1 mutations in the HRD group.