URMC / Encyclopedia / Content Search Encyclopedia Topic Index - Hematology and Blood Disorders in Children Hematology and Blood Disorders Home Overview of Blood and Blood Components What Are Red Blood Cells? What Are White Blood Cells? What Are Platelets? What Is Plasma? What Are Stem Cells? Blood Donations and Blood Banking Cord Blood Banking Blood Clotting Disorders in Children Blood Disorders Anemia Aplastic Anemia Hemolytic Anemia Iron Deficiency Anemia Megaloblastic (Pernicious) Anemia Sickle Cell Disease Thalassemia Alpha Thalassemia Beta Thalassemia (Cooley's Anemia) Bleeding Disorders Hemophilia Idiopathic Thrombocytopenic Purpura Leukemia Bone Marrow Transplant