Recurrent abdominal thrombosis despite heparin thromboprophylaxis in a patient with transient eosinophilia.

A 21-year-old girl with an ischemic bowel developed portal and splenic vein thrombosis 3 weeks later, despite thromboprophylaxis low-molecular-weight heparin. An extensive thrombophilia screen was negative and the only possible reason for her vascular occlusion was transient but severe eosinophilia. The role of transient eosinophilia in thrombosis is discussed in the light of other similar rare cases.