Inclusion Criteria:  Patient treated for cancer at one of the participating center 18 years old or higher Signed informed consent form Patient not deprived of their liberty or under guardianship (including temporary guardianship) Patient covered by social security scheme Patient with no compliance issue (related to geographical, social or psychological reasons) for study follow up Other additional criteria will be defined (defining tumor type and clinical setting), by cohort  Additional inclusion or non-inclusion criteria if a tumor biopsy is needed :  Tumor considered as accessible by biopsy, according to the investigator Normal blood coagulation tests on the last blood analysis No anticoagulant or antiaggregant drug that cannot be discontinued for the biopsy