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The prevalence of Hemoglobin H disease mirrors that of the hemoglobinopathies. As a whole, they are most prevalent in individuals of Asian, African, and Mediterranean decent. [ 5 ] There is a protective effect against malaria for individuals carrying thalassemia genes, which explains the high frequency of thalassemia within the worldwide ...
Alpha thalassemia is has greatest prevalence in populations originating from Southeast Asia, Mediterranean countries, Africa, the Middle East, India, and Central Asia. [7] Having a mild form of alpha thalassemia has been demonstrated to protect against malaria and thus can be an advantage in malaria endemic areas. [12]
β thalassemia major (Mediterranean anemia or Cooley anemia) is caused by a β o /β o genotype. No functional β chains are produced, and thus no hemoglobin A can be assembled. This is the most severe form of β-thalassemia. β thalassemia intermedia is caused by a β + /β o or β + /β + genotype. In this form, some hemoglobin A is produced.
Alpha-thalassemia: D56.0: 448, 33334, 33678: Alpha-thalassemia (α-thalassemia) is a form of thalassemia involving the genes HBA1 [20] and HBA2. [21] It is condition that causes a reduction of hemoglobin production. There are two types of Alpha-thalassemia, named hemoglobin Bart hydrops fetalis syndrome (also known as Hb Bart syndrome) and HbH ...
This list concerns blood type distribution between countries and regions.Blood type (also called a blood group) is a classification of blood, based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells (RBCs).
Beta-thalassemia; Other names: Microcytemia, beta type [1] Beta thalassemia genetics, the picture shows one example of how beta thalassemia is inherited. The beta globin gene is located on chromosome 11. A child inherits two beta globin genes (one from each parent). Specialty: Hematology: Types: Thalassemia minor, intermediate and major [2] Causes
Therefore, most transfusion-dependent thalassemia patients can be diagnosed within the first few years of life, which severe anemia, differed growth, jaundice and hepatosplenomegaly can be observed. Parameters for confirmation includes baseline hemoglobin level <7g/dL, enlargement of liver and spleen (>5 cm) and height in the first 10th percentile.
ATR-16 syndrome patients have a 1-2Mb deletion on the top of the chromosome 16 p-arm and are associated with a Mendelian inheritance of a-thalassemia. [7] ATR-X syndrome patients have no deletion in chromosome 16, a-thalassemia is rare, and this syndrome is consistent with X-linked recessive inheritance. [8]
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