PIK3CA and neoplasm: The everolimus-exemestane combination remains an effective and reasonably well-tolerated second-line therapeutic option after progression to first-line AI plus/minus CDK 4/6 inhibitor treatment in HR+ HER2− mBC patients with PIK3CA-wt disease, as well as in patients with PIK3CA-mutated neoplasms who have contraindications to alpelisib, or those experiencing severe AEs during alpelisib/fulvestrant therapy.