PALB2 and Lynch syndrome: Of these, five mutations (9.26%, 5/54) were in homologous recombination repair (HRR) pathway genes, including PALB2 (1.85%, 1/54), BLM (1.85%, 1/54), NBN (1.85%, 1/54), RAD51C (1.85%, 1/54), and RAD51D (1.85%, 1/54), and one mutation was in MSH3 (1.85%, 1/54) related to Lynch syndrome.