BARD1 and breast cancer: In total, 144 BARD1 PVs, constituting 69 distinct PVs, were identified in either BC or OC cases, constituting 120 PVs (60 distinct PVs) in 48,717 BC cases (0.25%) and 24 PVs (17 distinct PVs) in 20,799 OC cases (0.12%).