BRCA1 and aneurysmal bone cyst: Consistently, a retrospective study conducted in Korea showed that the presence of a germline genetic alteration in BRCA1/2 is associated with an inferior PFS in ABC patients treated with palbociclib plus ET, both compared to gBRCA1/2wt patients (9.0 months vs. not reached, p = 0.031) and the untested population (9.0 months vs. 33.0 months, p = 0.001) [24].