MedicineOncologySurgeryMedical OncologyMetastasisSurgical OncologyCirculating Tumor CellsCirculating Tumor Dna AnalysisMalignant NeoplasmsMalignant TumorsBlood Sampling From Venous LinesCirculating Tumor Cell CharacterizationCirculating Tumor Cell DisseminationCirculating Tumor Cell EnumerationCirculating Tumor Cell MonitoringCirculating Tumor Dna DetectionCirculating Tumor Dna TestingCirculating Tumor Markers