“…In an attempt to address the presumed pathogenetic mechanism, antiplatelet or anticoagulant agents such as acetylsalicylic acid, dipyridamole, and heparin are often prescribed (2,4,6,(8)(9)(10)(11) (Table 1). Immunosuppressive regimens including cyclosporine, azathioprine, cyclophosphamide, and systemic corticosteroids have been tried and are ineffective (2,3,6,7,20,21) (Table 1). Eculizumab and treprostinil have proven beneficial in some cases, although the evidence is anecdotal (7,18).…”