A Case of Mycosis Fungoides with Remarkable Eosinophilia

Abstract

A 35-year-old woman had been suffering from mycosis fungoides for four years. The tumors rapidly advanced, and at the same time, her peripheral blood count showed a remarkable eosinophilia (max; WBC 124,000/μl, Eosinophil 89.5%). The findings of a bone marrow examination and dissection showed neither the existence of eosinophilic leukemia nor parasites. We, therefore, speculated that the cause of eosinophilia may have been associated with some other factors related to malignant T-lymphocytes.