In the experiment of the purification of MDS clonal cells using IGF-IR, MDS BMNCs with chromosomal abnormalities were used for positive IGF-IR sorting, and the sorting of some MDS bone marrow cells with significantly active erythroid linage hyperplasia (granulocyte/erythroid ratio less than 1) was performed after the removal of the erythroid lineage. The gene discussed is IGF1R; the disease is myelodysplastic syndrome.