Prevalence of Asymptomatic Thrombosis in Multiple Myeloma

Inclusion Criteria: * Patient major age ≥18 years * Patients with symptomatic myeloma meeting the definition of the International Myeloma Working Group, regardless of the therapeutic line, including patients in remission and untreated. * Patient having given informed consent, signed. * Patient benefiting from a social security scheme Exclusion Criteria: * Patients with non-symptomatic myeloma (stage I) or gammapathy of unknown significance (MGUS). * Patient undergoing antithrombotic treatment for deep or superficial venous thrombosis and / or pulmonary embolism at the time of inclusion. * Patients with occlusive arterial disease of the lower limbs known at the time of inclusion. * Minors, protected adults and patients deprived of liberty or not affiliated to a social security scheme * Pregnant woman * Patient unable to express consent. * Patient under guardianship or curatorship or patient deprived of public liberty