Clinical Research Directory

Inclusion Criteria: * All patients with a clear diagnosis of Glanzmann Thrombastenia (GT), whatever the subtype of disease. * Affiliated person or beneficiary of a social security scheme. * Free, informed and written consent signed by the participant, or parents or legal representant for the child population, and the investigator (at the latest on the day of inclusion and before any examination required by the research). Exclusion Criteria: * Current treatment that may interfere with anti-αIIbβ3 antibodies detection, such as intravenous immunoglobulins within the previous month. * Psychiatric, social or behavioral condition judged to be non-compatible with the respect of the protocol, including good observance of treatment and compliance to follow-up. * Adult protected by the law.