When to look for clonal/neoplastic hypereosinophilia (HEo)? - Exclusion of frequent causes (Drug-induced HEo, helminthiasis, cancer, ...) - Clinical symptoms (Male gender, Splenomegaly) - Hemogram abnormalities (Cytopenia, Other cell proliferation, monocytosis) - Myelogram/BM biopsy (Mast cells (FIP1L1), Myelofibrosis, Blastosis) - Incr Cobalamin, Incr Tryptase - Resistance to glucocorticoids By Dr. Julien Rohmer via Dr. Benjamin Terrier @TerrierBen #Neoplastic #hypereosinophilia #HEON #Diagnosis #Signs #Hematology #Workup