Tumors of the hematopoietic and lymphoid tissues
Tumors of the hematopoietic (blood cell forming) and lymphoid tissues are local growths. Hematopoietic and lymphoid malignancies are cancers that affect the blood, bone marrow, lymph, and lymphatic system. As the blood and lymph connect through both the circulatory system and the immune system, a disease affecting one will often affect the others as well.