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Aplastic anemia is a rare, noncancerous disorder in which the blood marrow is unable to adequately produce blood cells required for survival. [44] [45] It is estimated that the incidence of aplastic anemia is 0.7–4.1 cases per million people worldwide, with the prevalence between men and women being approximately equal. [46]
Pure red cell aplasia (PRCA) or erythroblastopenia refers to a type of aplastic anemia affecting the precursors to red blood cells but usually not to white blood cells. In PRCA, the bone marrow ceases to produce red blood cells. There are multiple etiologies that can cause PRCA. The condition has been first described by Paul Kaznelson in 1922. [1]
Aplastic anemia patients present with symptoms related to a decrease in hematopoietic cell production in the bone marrow. The onset is gradual, and the first symptom is frequently anemia or bleeding, though a high temperature or infections may be present at the onset. The following are examples of specific manifestations: [12]
Anemia is common, affecting more than 1 in 20 people. There are three major pathways for our red blood cell count to become low: Loss of blood from the blood stream:
Bone marrow failure in both children and adults can be either inherited or acquired. Inherited bone marrow failure is often the cause in young children, while older children and adults may acquire the disease later in life. [3] Acquired bone marrow failure may be due to aplastic anemia [4] or myelodysplastic syndrome.
Anemia can be temporary or long term and can range from mild to severe. [6] Anemia can be caused by blood loss, decreased red blood cell production, and increased red blood cell breakdown. [1] Causes of blood loss include bleeding due to inflammation of the stomach or intestines, bleeding from surgery, serious injury, or blood donation. [1]
Anemia of prematurity is a form of anemia affecting preterm infants [25] with decreased hematocrit. [26] Aplastic anemia: D60-D61: 866: Aplastic anemia is a condition where bone marrow does not produce sufficient new cells to replenish blood cells. [27] Autoimmune hemolytic anemia: D59.0-D59.1
This is termed "aplastic crisis" (also called reticulocytopenia). It is treated with blood transfusion. Parvovirus B19 is a cause of chronic anemia in individuals with immunodeficiency, receiving immunosuppressive therapy or with HIV infection. Treatment with intravenous immunoglobulin usually resolves the anemia although relapse can occur.