Cancer involving the blood-forming tissues in bone marrow. See Cancer Leukemia programs.BloodEncyclopedia Entry for Leukemia :Leukemia - resources. Resources - leukemia.Immune system structures Immune system structures.Encyclopedia Entry for Leukemia :Leukemia. Bone marrow aspiration Bone marrow aspiration Acute lymphocytic leukemia - photomicrograph Acute lymphocytic leukemia - photomicrograph Auer rods Auer rods Chronic lymphocytic leukemia - microscopic view Chronic lymphocytic leukemia - microscopic view Chronic myelocytic leukemia - microscopic view Chronic myelocytic leukemia - microscopic view Chronic myelocytic leukemia Chronic myelocytic leukemia Chronic myelocytic leukemia Chronic myelocytic leukemia.Appelbaum FR. Acute leukemias in adults.Encyclopedia Entry for Leukemia :Leukemia. Can be caused by human T-cell leukemia virus-1.Information from Marcello Allegretti.