 Disruption in lymphopoiesis can lead to a number of lymphoproliferative disorders, such as the lymphomas and lymphoid leukemias.Lymphocytes are considered to be of the lymphoid lineage as opposed to other lineages of blood cells such as the myeloid lineage and the erythroid lineage.Nomenclature, the system of naming things properly, is not trivial in this case because although lymphocytes are found in the bloodstream and originate in the bone marrow, they principally belong to the separate lymphatic system which interacts with the blood circulation.