Bone marrow primitive cells with 6% and 12% suggest a possible hematologic disorder such as acute leukemia. 1. Bone marrow primitive cells belong to the stem and progenitor cells within the bone marrow that have the ability to further proliferate and differentiate into granulocytes, erythrocytes, monocytes, lymphocytes and megakaryocytes. These cells are immature cells at the beginning of hematopoiesis and need to be further differentiated and developed into functional mature cells, which then enter the bloodstream and play a normal hematopoietic function. 2. Generally speaking, the percentage of primitive cells in the bone marrow should not be more than 5%. If the percentage is higher than 5%, it suggests a higher possibility of hematopoietic disease, which means that the bone marrow is abnormally proliferating. More than 5% suggests myelodysplastic syndrome, and more than 20% suggests acute leukemia. If there are 6% and 12% of primitive cells in the bone marrow, it is recommended to go to the hospital in time, to clarify the cause of the disease, to make a clear diagnosis under the guidance of the doctor, and to carry out standardized treatment.