ERBB2 and neoplasm: On the other hand, Eve and Alp may provide similar relative PFS advantage in patients with PIK3CA-mutated neoplasms [30, 34]; however, this hypothesis derives from a NGS subanalysis of the BOLERO-2 trial and should be confirmed in prospective studies directly comparing Eve and Alp in patients with PIK3CA-mutated HR+ HER2− mBC.