Synonyms for Histiocytic Leukemia (same or very similar meaning)
WordNet sense 1 (leukemia characterized by the proliferation of monocytes and monoblasts in the blood):
monocytic leukemia, histiocytic leukaemia, monoblastic leukaemia, monoblastic leukemia, monocytic leukaemia
From the ODE community, based on WordNet
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