This study aims to assess biomarkers and their related polymorphisms in the context of cancer-associated thromboembolism, with a particular focus on their interaction with the immune system. The roles of immune checkpoints, inflammatory and angiogenesis factors, as well as circulating immune cells will be elucidated. Additionally, our investigation extends to the exploration of long non-coding RNAs (LncRNAs) and genes associated with the coagulation vascular system. Initially, these aspects will be evaluated in the context of colorectal cancer, with the intention to expand our research to other solid tumors. The identification of these biomarkers and genetic factors holds the potential to revolutionize therapeutic approaches for patients with cancer-associated thromboembolism, shedding light on their chemotherapy resistance. The effectiveness of combining immunotherapy with targeted inhibitors like Palbociclib and anticoagulants such as Rivaroxaban, among other potential interventions, will be assessed. This study aims to make significant contributions to the understanding of these critical aspects, ultimately leading to the development of more effective treatment strategies for cancer patients.