Which forms of thrombotic microangiopathy have been reported with interferon beta products such as Avonex (interferon beta-1a)?

Thrombotic thrombocytopenic purpura (TTP) and haemolytic uraemic syndrome (HUS), including fatal cases, have been reported as forms of thrombotic microangiopathy with interferon beta products such as Avonex (interferon beta-1a).