The Fondaparinux Paradox: Fondaparinux-Related Heparin-induced Thrombocytopenia.

Fondaparinux, a pentasaccharide administered for heparin-induced thrombocytopenia (HIT), can lead to the occurrence of thrombocytopenia. This patient underwent aortic stent graft placement for Salmonella paratyphi A-infected abdominal aortic aneurysm. Fondaparinux was administered for anticoagulation that led to a dramatic decline in his platelet counts. Investigations revealed HIT profile, PF4/heparin by particle gel immunoassay to be positive. Fondaparinux, a prescribed anticoagulant for HIT can paradoxically predispose to thrombocytopenia.