Multicentral Retrospective Chart Review Study of Targeted Therapy Use in Patients With BRAF V600 Advanced (Unresectable or Metastatic) Cutaneous Melanoma in Routine Clinical Practice in Russian Federation

This study is an observational multicentral retrospective chart review study in patients with BRAF V600 positive advanced (unresectable or metastatic) cutaneous melanoma, who have treated by BRAF inhibitors (BRAFi) or MEK inhibitors (MEKi) in routine clinical practice in Russia. 300 patients will be included in the study.

The study does not aim to prove any formal hypothesis and does not imply any intervention in standard medical care, and all medical events recorded during the study have already occurred. The data sources of this study will be medical records, patients' charts and other related medical documentation that allows to fully follow the course of the disease and collect all the necessary information according to Protocol.

For identification of molecular genetic markers that cause resistance and sensitivity to targeted therapy, an analysis of tumor tissue will be provided in the laboratory of biological microchips "Institute of Molecular Biology. V.A. Engelhardt" of the Russian Academy of Sciences. The analyzed materials will be paraffin blocks with samples of tumor tissue of only patients with primary resistance to targeted therapy (inhibitors BRAF / +/- MEK inhibitor).

In the course of the study, the Contract Research Organization (CRO) "Crocus Medical B.V." will conduct periodic monitoring visits to ensure that the data collected are accurate and credible. Regular monitoring visits include Source Data Verification (SDV) in accordance with the monitoring plan, monitoring compliance with the research procedures, as well as the proper and timely maintenance of the main clinical study documents, including the reporting provided for by the rules of good clinical practice, the legislation of the Russian Federation and Standard Operating Procedures (SOPs) of the CRO.

The investigators will be responsible for the collection and provision of all clinical and laboratory data, as well as safety data, that are entered in electronic Case Report Forms (e-CRF), and must ensure data authenticity and compliance with the primary documentation.