[Hematopoietic changes in mice with transplantable Lewis lung carcinoma].

The cell composition of bone marrow, spleen, and peripheral blood as well as the content of early granulocytic and macrophagal precursor cells forming colonies in agar cultures in diffusion chambers in vivo (CFU-DC) were studied in C57B1/6 mice during the Lewis carcinoma growth after subcutaneous transplantation of tumour cells. It has been shown that in peripheral blood of such mice neutrophilic leucocytosis develops and the content of CFU-DC increases considerably. The spleen has become a source of surplus production of granulocytic and macrophagal cells from the early precursors (CFU-DC) to the mature cell forms with their delivery to the peripheral blood. No essential changes in the cell composition and CFU-DC content were found in the bone marrow of femur.