The RAS testing in real world management of metastatic colorectal cancer: The results of Italian Laboratories Survey

Approximately 15-30 % of patients with colorectal cancer (CRC) present with metastases at diagnosis, while up to 50 % will develop metastases during follow-up. The integration of targeted drugs into standard chemotherapy has significantly improved clinical outcomes, with anti-EGFR monoclonal antibodies playing a crucial role in the treatment of RAS wild-type metastatic CRC. In this context, high-quality RAS testing is essential. A national survey was carried out among 60 Italian laboratories to assess the state of the art for RAS testing. Based on the reported frequency of RAS mutations, laboratories were classified as "in range" (n. 35; RAS mutation frequency >42 % and