1998;58(2):137-141 [PubMed] [Google Scholar] 47. a simplified algorithm for distinguishing the many factors behind idiopathic and clonal eosinophilia and talk about current therapy, including new medicines (imatinib mesylate, alemtuzumab, and mepolizumab). CEL-NOS = chronic eosinophilic leukemia, not otherwise specified; FISH = fluorescence in situ hybridization; HES = hypereosinophilic syndrome; PDGFR Continue Reading