Choice of therapy for HER2-positive metastatic breast cancer in real clinical practice: analysis of physician preferences in Russian Federation

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Metastatic breast cancer still remains an incurable disease, requiring lifelong treatment. Introduction of targeted therapy into clinical practice has radically changed treatment approaches of HER2-positive breast cancer, making it possible to significantly increase the life expectancy. The treatment algorithm for HER2-positive metastatic breast cancer appears to be quite clear and is reflected in both international and Russian recommendations. To assess actual clinical practice in the Russian Federation, a survey study “Therapy of Her2-positive breast cancer” was conducted. This publication presents results dedicated to the treatment of metastatic HER2-positive breast cancer. 50 specialists from 43 cities took part in the survey. Only heads of departments or their deputies who were personally involved in determining the treatment for patients were allowed to participate. Expertise of this level allows us to reliably assess the actual clinical practice that has developed in the Russian Federation and determine directions for optimizing therapeutic approaches. Despite ongoing questions about the availability of drugs, doctors primarily focus on the effectiveness of treatment. The main first-line therapy in the Russian Federation is the combination of trastuzumab with pertuzumab. However, experts noted that in conditions of unlimited access to drugs, the number of prescriptions for this regimen in the first line would increase by 13%. Doctors also agree that the use of a subcutaneous form of this combination of drugs would optimize the treatment process. Trastuzumab emtansine remains the standard of second-line therapy and, according to the survey results, almost all patients for whom it is indicated receive this type of therapy. Experts predict more frequent use of trastuzumab emtansine in first-line therapy, given the widespread use of neoadjuvant regimens with pertuzumab. The most significant changes are expected in the third line of therapy with the introduction of the new conjugate – trastuzumab deruxtecan. The survey results demonstrate high awareness and commitment of physicians to modern principles of treatment of HER2-positive mBC.