RT Book, Section A1 Bissonnette, Bruno A1 Luginbuehl, Igor A1 Engelhardt, Thomas SR Print(0) ID 1164073277 T1 Hypereosinophilic Syndrome (HES) T2 Syndromes: Rapid Recognition and Perioperative Implications, 2e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9781259861789 LK accesspediatrics.mhmedical.com/content.aspx?aid=1164073277 RD 2024/10/07 AB HES is a myeloproliferative disorder characterized by the simultaneous existence of (1) eosinophil count greater than 1500/mm3 for more than 6 months, (2) absence of any known cause of eosinophilia, and (3) with involvement of the heart, nervous system, and bone marrow (benign eosinophilia is excluded). Patients without symptoms of chronic heart failure and responding well to prednisone have a good prognosis. However, the mortality rate rises in patients with anemia.