Dr. Maciejewski is recognized for his leadership in finding better treatments and a cure for bone marrow failure bone marrow failure: A condition that occurs when the bone marrow stops making enough healthy blood cells. The most common of these rare diseases are aplastic anemia, myelodysplastic syndromes (MDS) and paroxysmal nocturnal hemoglobinuria (PNH). Bone marrow failure can be acquired (begin any time in life) or can be… diseases, as well as his commitment to cultivating a new generation of researchers in his lab. He also provides the highest quality care and compassion to his patients and the AAMDSIF community. His clinical areas of expertise include bone marrow failure syndromes - aplastic anemia aplastic anemia: (ay-PLASS-tik uh-NEE_mee-uh) A rare and serious condition in which the bone marrow fails to make enough blood cells - red blood cells, white blood cells, and platelets. The term aplastic is a Greek word meaning not to form. Anemia is a condition that happens when red blood cell count is low. Most… , MDS, large granular lymphocyte lymphocyte: A type of white blood cell. B lymphoctyes, or B cells, help make special proteins called antibodies that fight bacteria and viruses (immune response). T lymphocytes, or T cells, help kill tumor cells and help the body's immune response. leukemia, PNH and myeloid malignancies. His research includes the molecular pathogenesis of these disorders and various specific aspects of stem cell biology, genetics, cytogenetics cytogenetics: (sie-toe-juh-NEH-tiks) The study of chromosomes (DNA), the part of the cell that contains genetic information. Some cytogenetic abnormalities are linked to different forms of myelodysplastic syndromes (MDS). and immunobiology.