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Sickle cell disease occurs when a person inherits two abnormal copies of the β-globin gene ( HBB) that makes haemoglobin, one from each parent. [3] This gene occurs in chromosome 11. [11] Several subtypes exist, depending on the exact mutation in each haemoglobin gene. [2]
Sickle cell trait describes a condition in which a person has one abnormal allele of the hemoglobin beta gene (is heterozygous ), but does not display the severe symptoms of sickle cell disease that occur in a person who has two copies of that allele (is homozygous ).
Differential diagnosis. Neuropathic pain, hyperalgesia, osteomyelitis. A vaso-occlusive crisis is a common painful complication of sickle cell anemia in adolescents and adults. [1] [2] It is a form of sickle cell crisis.
Sickle cell-Hb Lepore Boston syndrome is a type of sickle cell disease (HbS) that differs from homozygous sickle cell disease where both parents carry sickle hemoglobin. In this variant one parent has the sickle cell hemoglobin the second parent has Hb Lepore Boston, the only one of the three variants described in association with HbS. [7]
Thalassemias are inherited blood disorders that result in abnormal hemoglobin. [7] Symptoms depend on the type of thalassemia and can vary from none to severe. [1] Often there is mild to severe anemia (low red blood cells or hemoglobin) as thalassemia can affect the production of red blood cells and also affect how long the red blood cells live. [1] Symptoms of anemia include feeling tired and ...
Splenic sequestration crisis is a life-threatening illness common in pediatric patients with homozygous sickle cell disease and beta thalassemia. Up to 30% of these children may develop splenic sequestration crisis with a mortality rate of up to 15%. This crisis occurs when splenic vaso-occlusion causes a large percentage of total blood volume ...
Pathophysiology. The development of sickle cell nephropathy (SCN) typically occurs in childhood as seen in the appearance of hyperfiltration and proteinuria. [1] Both are primarily caused by the polymerization of sickle cells in the kidney microvasculature due to the low O 2 tension, high osmolarity, and low acidity. [2]
There are many different diseases affecting children that have a prolonged course and can lead to disability or impairment including asthma, sickle cell anemia, congenital heart disease, obesity, neurodevelopmental conditions, and epilepsy.
The acute chest syndrome is a vaso-occlusive crisis of the pulmonary vasculature commonly seen in people with sickle cell anemia. This condition commonly manifests with a new opacification of the lung (s) on a chest x-ray. [1]
Pathophysiology. Schistocyte formation occurs as a result of mechanical destruction (fragmentation hemolysis) of a normal red blood cell. This occurs when there is damage to the blood vessel and a clot begins to form. The formation of the fibrin strands in the vessels occurs as part of the clot formation process.
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