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Acute radiation syndrome (ARS), also known as radiation sickness or radiation poisoning, is a collection of health effects that are caused by being exposed to high amounts of ionizing radiation in a short period of time. [1] Symptoms can start within an hour of exposure, and can last for several months.
Aplastic anemia [2] (AA) [3] is a severe hematologic condition in which the body fails to make blood cells in sufficient numbers. Blood cells are produced in the bone marrow by stem cells that reside there. [4] Aplastic anemia causes a deficiency of all blood cell types: red blood cells, white blood cells, and platelets. [5] [6]
Aplastic anemia is a bone marrow failure syndrome characterized by peripheral pancytopenia and bone marrow hypoplasia. Although the anemia is usually normocytic , mild macrocytosis can be seen in conjunction with stress erythropoiesis and raised fetal hemoglobin levels.
This is a life-threatening disorder that is a characteristic of aplastic anemia. [3] There are also two general causes of cytopenia: autoimmune and refractory. Autoimmune cytopenia is caused by an autoimmune disease when your body produces antibodies to destroy the healthy blood cells.
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]
Curie later died of aplastic anemia caused by radiation poisoning. Eben Byers, a famous American socialite, died of multiple cancers (but not acute radiation syndrome) in 1932 after consuming large quantities of radium over several years; his death drew public attention to dangers of radiation. By the 1930s, after a number of cases of bone ...
Diamond-Blackfan Anemia is an example of a congenital bone marrow failure syndrome that primarily affects red blood cell production. In DBA, the erythroid cell lineage is more susceptible to cell death due to abnormal ribosome function. [4] This leads to a reduced population of red blood cell precursors and a resulting reticulocytopenia and anemia.
There is a threshold dose which causes clinical radiation damage of cells in the body. [5] As the dose increases, the severity of injury increases. [5] This also impairs tissue recovery. [5] The IRCP also describes how cancer develops following radiation exposure. [5] This happens via DNA damage response processes. [5]