Congenital Abnormality
sitosterolemia
Definitions related to sitosterolemia:
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An extremely rare autosomal recessive inherited disorder caused by mutations in the ABCG5 or ABCG8 genes. It is characterized by a defective sterolin transporter that impairs the elimination of plant sterols and, to a lesser degree, cholesterol from the body. These fatty substances build up in the tissues including arteries and skin, resulting in atherosclerosis and xanthomas.NCI ThesaurusU.S. National Cancer Institute, 2021
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Sitosterolemia is characterized by: Hypercholesterolemia (especially in children) which (1) shows an unexpected significant lowering of plasma cholesterol level in response to low-fat diet modification or to bile acid sequestrant therapy; or (2) does not respond to statin therapy; Tendon xanthomas or tuberous (i.e., planar) xanthomas that can occur in childhood and in unusual locations (heels, knees, elbows, and buttocks); Premature atherosclerosis, which can lead to angina, aortic valve involvement, myocardial infarction, and sudden death; Hemolytic anemia, abnormally shaped erythrocytes (stomatocytes), and large platelets (macrothrombocytopenia). On occasion, the abnormal hematologic findings may be the initial presentation or the only clinical feature of this disorder. Arthritis, arthralgias, and splenomegaly may sometimes be seen and one study has concluded that "idiopathic" liver disease could be undiagnosed sitosterolemia. The clinical spectrum of sitosterolemia is probably not fully appreciated due to underdiagnosis and the fact that the phenotype in infants is likely to be highly dependent on diet.GeneReviewsUniversity of Washington, 2021
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Sitosterolemia is a rare inherited plant sterol storage disease. Bhattacharyya and Connor first described this disease in 1974.WebMD, 2019
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Sitosterolemia is a rare inherited condition in which plant sterols accumulate in the blood and tissues. Plant sterols, including sitosterol, stigmasterol, and campesterol, are fatty substances found in vegetable oils and nuts. Individuals with sitosterolemia have extremely high levels of sitosterol (30 to 100 times higher than normal),...National Center for Advancing Translational Sciences
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