[The erythrokaryocyte, the reticulocyte, the normocyte: their place in the scheme of erythropoiesis].

Estimation of reticulocyte and polychromatophil counts has shown that only 28.7-44.9 percent of blood reticulocytes and 61.7 percent of bone marrow reticulocytes are polychromatophilic. Polychromatophil count is approximately equal to the sum of classes I and II reticulocytes. Bone marrow smears staining to detect reticulocytes, followed by staining according to Romanovsky-Giemsa has shown that only solitary erythrokaryocytes did not contain granular or filament reticular substance. The authors analyze the following suppositions: eliminate reticulocytes from the erythropoiesis scheme, denote the former normoblasts erythrokaryocytes but not normocytes, demonstrate the possibility of mature red cell production from oxyphilic erythrokaryocytes and from polychromophilic erythrokaryocytes via polychromatophilic red cells in the scheme.