Thrombin Generation and Prediction of Thromboembolic Events in Oncology Patients at Risk

Inclusion Criteria: 1. Patient aged \> 18 years, 2. Patient with a solid cancer at high risk of thrombosis, whether metastatic or not (lung, pancreatic, gastric or glioblastoma cancers)1, 3. Patients who have not received any systemic treatment for their cancer, 4. An informed patient who does not object to the use of data for research purposes and who has consented to the collection, use and storage of biological samples. Exclusion Criteria: 1. Patient who has had a VTE in the 12 months preceding the diagnosis of cancer, 2. Patient on low molecular weight heparins, standard unfractionated heparins and anti-vitamin K2, 3. Women who are pregnant, likely to become pregnant or who are breast-feeding, 4. Persons deprived of their liberty, under court protection, under curators or under the authority of a guardian, 5. Unable to undergo medical monitoring of the trial for geographical, social or psychological reasons.