Red blood cell disorders

Microcytosis is a condition in which red blood cells are unusually small as measured by their mean corpuscular volume.

Sulfhemoglobinemia (or sulfhaemoglobinaemia) is a rare condition in which there is excess sulfhemoglobin (SulfHb) in the blood.

Haemochromatosis (or hemochromatosis) type 1 (also HFE hereditary haemochromatosis or HFE-related hereditary haemochromatosis) is a hereditary disease characterized by excessive intestinal absorption of dietary iron resulting in a pathological increase in total body iron stores.

Iron deficiency is the most common nutritional deficiency in the world.

Atransferrinemia, also called familial hypotransferrinemia, is an autosomal recessive metabolic disorder in which there is an absence of transferrin, a plasma protein that transports iron through the blood.

The acute chest syndrome is a vaso-occlusive crisis of the pulmonary vasculature commonly seen in patients with sickle cell anemia.

Aldolase A deficiency, also called ALDOA deficiency or red cell aldolase deficiency, is an autosomal recessive metabolic disorder resulting in a deficiency of the enzyme aldolase A, which is found predominantly in red blood cells and muscle tissue.

Haemochromatosis type 3 is a type of Iron overload disorder associated with deficiencies in transferrin receptor 2.

Polycythemia (also known as polycythaemia or polyglobulia) is a disease state in which the proportion of blood volume that is occupied by red blood cells increases.

African iron overload, also known as (Bantu siderosis,or Dietary iron overload), is an iron overload disorder first observed among people of African descent in Southern Africa and Central Africa.

Reticulocytopenia, also known as an "aplastic crisis" or "marrow failure", is the medical term for an abnormal decrease of reticulocytes in the body.

Latent iron deficiency (LID), also called iron-deficient erythropoiesis, is a medical condition in which there is evidence of iron deficiency without anemia (normal hemoglobin level).

Hereditary pyropoikilocytosis (HPP) is an autosomal recessive form of hemolytic anemia characterized by an abnormal sensitivity of red blood cells to heat and erythrocyte morphology similar to that seen in thermal burns.

Sick cell syndrome or cell sickness syndrome is a medical condition characterised by reduced functioning of the cellular Na+/K+ pump, which is responsible for maintaining the internal ion homeostasis.

Methemoglobinemia (or methaemoglobinaemia) is a disorder characterized by the presence of a higher than normal level of methemoglobin (metHb, i.e., ferric [Fe3+] rather than ferrous [Fe2+] haemoglobin) in the blood.

McLeod syndrome (or McLeod phenomenon; /məˈklaʊd/) is an X-linked recessive genetic disorder that may affect the blood, brain, peripheral nerves, muscle, and heart.

Poikilocytosis refers to the presence of poikilocytes in the blood.

Congenital dyserythropoietic anemia (CDA) is a rare blood disorder, similar to the thalassemias.

Polychromasia (also known as Polychromatophilia) is a disorder where there is an abnormally high number of immature red blood cells found in the bloodstream as a result of being prematurely released from the bone marrow during blood formation.