RT Journal Article SR Electronic T1 Factor V Leiden mutation and deep venous thrombosis in a patient with hypereosinophilic syndrome JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1418 OP 1420 VO 27 IS 9 A1 Vahap Aslan A1 Emre Entok YR 2006 UL http://smj.org.sa/content/27/9/1418.abstract AB Idiopathic hypereosinophilic syndrome is a rare condition characterized by extremely high peripheral blood eosinophil counts. Patients with idiopathic hypereosinophilic syndrome are at increased risk for thrombosis. The coexistence of idiopathic hypereosinophilic syndrome with other thrombotic disease is rare. We present an additional case of idiopathic hypereosinophilic syndrome and factor V Leiden mutation, which lead to deep vein thrombosis.