[Preclinical form of blast leukosis]

The problem of the early diagnosis "acute" leukosis is of a great practical and theoretical interest. Lately many authors speak of "pre-leukemic syndrome" or of "pre-leukemia". In that sense the notion "acute" leukosis appears to be inaccurate and its substitution for the term "blast" leukosis is more expedient. A woman-patient with an early form of blast leukosis is described in the paper, diagnosed by a sternal puncture 18 months before the typical clinical and cytomorphological manifestations of the disease. The total pre-leukemic "stage" lasted three years, manifested with persisting anemia, acceleated RES, granulocytopenia, monocytosis. Exitus followed after the fifth month of the blast eucosis clinical manifestation.