<unk>  is a condition where the bone marrow and the bone marrow cells are damaged .  A deficiency of all the three cell types is seen which leads to pancytopenia .
Decrease in red blood cells (Anemia) presents as pallor, fatigue , dyspnea and leg pain .  Decrease in platelets (Thrombocytopenia) presents as mucosal bleeding , purpura and bruising .  Decrease in white blood cells (Neutropenia) manifests as recurrent infection .
Aplastic anemia
Polycythemia vera
Myelodysplastic syndrome
Myelofibrosis
Transient erythroblastopenia of childhood
Sideroblastic anemia
Drug induced hemolytic anemia
Acute myeloid leukemia