Role of palbociclib in the treatment of hormone receptor-positive HER2-negative metastatic breast cancer. Generalizing results of randomized trials and real clinical practice

Palbociclib is the first-in-class drug of CDK 4/6 inhibitors group. The use of palbociclib in combination with endocrinotherapy (ET) opens up new possibilities for the treatment of metastatic hormone receptor-positive (HRP+) HER2-negative (HER2-) breast cancer (mBC). Palbociclib has gained world attention and is included in all clinical guidelines, both international and domestic, as a new standard of first- and second-line therapy of HRP+ HER2- mBC. The article presents the updated results of PALOMA-2 and PALOMA-3 studies and the results of use of palbociclib in combination with ET in real clinical practice.