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Diagnosis of alpha-thalassemia is primarily by laboratory evaluation and molecular diagnosis. Alpha-thalassemia can be mistaken for iron-deficiency anaemia on a full blood count or blood film, as both conditions have a microcytic anaemia. Serum iron and serum ferritin can be used to exclude iron-deficiency anaemia. [3]
Hemoglobin H disease, also called alpha-thalassemia intermedia, is a disease affecting hemoglobin, the oxygen carrying molecule within red blood cells. It is a form of Alpha-thalassemia which most commonly occurs due to deletion of 3 out of 4 of the α-globin genes. [1]
The severity of alpha and beta thalassemia depends on how many of the four genes for alpha globin or two genes for beta globin are faulty. [2] Diagnosis is typically by blood tests including a complete blood count, special hemoglobin tests, and genetic tests. [3] Diagnosis may occur before birth through prenatal testing. [8]
Acute blood loss is usually associated with an incident of trauma or a severe injury resulting in a large loss of blood. It can also occur during or after a surgical procedure. [19] Alpha-thalassemia: D56.0: 448, 33334, 33678: Alpha-thalassemia (α-thalassemia) is a form of thalassemia involving the genes HBA1 [20] and HBA2. [21]
A newly developed diagnostic test, called Immunochromatography (IC) Strip Tests, uses monoclonal antibodies to detect Hemoglobin Barts in red blood cells' lysate. This diagnostic test is validated for positive and negative predictive values. It is also cheap and easy, making regular screening for alpha-thalassemia a plausible possibility. [9] [10]
It is the most common nondeletional alpha-thalassemia mutation associated with hemoglobin H disease. [1] The quantity of hemoglobin in the cells is low because the messenger RNA is unstable and some is degraded prior to protein synthesis. Another reason is that the Constant Spring alpha chain protein is itself unstable.
Thalassemia is an inherited condition that has variants in alpha or beta globin genes that result in lower levels of globin chains required to make hemoglobin, resulting in alpha thalassemia or beta thalassemia, respectively. [3] Diagnosis is made by DNA analysis for alpha thalassemia and hemoglobin analysis for beta thalassemia. [3] Management ...
Alpha thalassemia patients have partial or complete defects in alpha globin production, leading to a relative abundance of beta globin chains in the cell. These excess beta globin chains aggregate to form HbH , which has decreased solubility and precipitates in the red blood cell cytoplasm . [ 10 ]
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