Prevalence of Synovitis in Patients With Haemophilia A

Inclusion Criteria: * Participants (≥ 18 years old) suffering from moderate or severe haemophilia A, also with inhibitor or joint replacement * Complete documentation of hemophilia severity, treatment history (past 12 months), and bleeding events (past 12 months), inhibitor status (at time of enrollment and in past medical history) * Submitted written consent to participate in the study Exclusion Criteria: * Patients suffering from other bleeding disorders conflicting with the research question * Patients in clinical studies with investigational drugs