| XLS | X-linked recessive lymphoproliferative syndrome |
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| XR | xeroradiography; X-linked recessive [inheritance]; x-ray |
| XRMR | X-linked recessive mental retardation |
| XRN | X-linked recessive nephrolithiasis |
| AC | abdominal circumference; abdominal compression; absorption coefficient; abuse case; acetate; acetylc... |
| type V familial hyperlipoproteinaemia | Hyperlipoproteinaemia characterised by increased plasma levels of chylomicrons, VLDL, pre-beta-lipoproteins, and triglycerides, and slight rise of cholesterol on a normal diet, with beta-lipoproteins normal; may be accompanied by bouts of abdominal pain, hepatosplenomegaly, susceptibility to atherosclerosis, and abnormal glucose tolerance; probably autosomal recessive inheritance. Synonym: combined fat-and carbohydrate-induced hyperlipaemia, familial hyperchylomicronaemia with hyperprebetalipoproteinaemia, mixed hyperlipaemia. (05 Mar 2000) |
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| familial | Occurring in families. An inherited disorder or trait. (27 Sep 1997) |
| familial aggregation | <genetics> The occurrence of a trait in more members of a family than can be readily accounted for by chance; presumptive but not cogent evidence of the operation of genetic factors. (05 Mar 2000) |
| familial amyloid neuropathy | <neurology> A disorder in which various peripheral nerves are infiltrated with amyloid and their functions disturbed, an abnormal prealbumin is also formed and is present in the blood; characteristically, it begins during mid-life and is found largely in persons of Portuguese descent. Other rare clinical types occur. Inheritance: autosomal dominant. Synonym: familial amyloidosis, hereditary amyloidosis. (05 Mar 2000) |
| familial amyloidosis | <neurology> A disorder in which various peripheral nerves are infiltrated with amyloid and their functions disturbed, an abnormal prealbumin is also formed and is present in the blood; characteristically, it begins during mid-life and is found largely in persons of Portuguese descent. Other rare clinical types occur. Inheritance: autosomal dominant. Synonym: familial amyloidosis, hereditary amyloidosis. (05 Mar 2000) |
| familial aortic ectasia | <cardiology, syndrome> The concurrence as an autosomal dominant trait of bicuspid aortic valve often with premature calcification, ectasia and dissection of the aorta and, rarely, coarctation of the aorta. Superficially resembles the Marfan's syndrome. Synonym: familial aortic ectasia. (05 Mar 2000) |
| familial aortic ectasia syndrome | <cardiology, syndrome> The concurrence as an autosomal dominant trait of bicuspid aortic valve often with premature calcification, ectasia and dissection of the aorta and, rarely, coarctation of the aorta. Superficially resembles the Marfan's syndrome. Synonym: familial aortic ectasia. (05 Mar 2000) |
| familial bipolar mood disorder | <psychiatry> Bipolar mood disorder commonly inherited as an autosomal dominant trait and also occasionally as an X-linked one. (05 Mar 2000) |
| familial breast cancer | <oncology> A number of factors have been identified that increase the risk of breast cancer. One of the strongest of these risk factors is the history of breast cancer in a relative. About15-20% of women with breast cancer have such a family history of the disease, clearly reflecting the participation of inherited (genetic) components in the development of some breast cancers. Dominant breast cancer suceptibility genes, including BRCA1 and BRCA2, appear responsible for about 5% of all breast cancer. See related entries to: Breast cancer susceptibility genes; BRCA1; BRCA2. There are 2 genes; BRCA1 and BRCA2 which are susceptibility genes for breast cancer. They are inherited factors that predispose to breast cancer. Put otherwise, these genes make one more susceptible to the disease and so increase the risk of developing breast cancer. Two of these genes, BRCA1 and BRCA2, have been identified (and prominently publicised). Several other genes (those for the li-fraumeni syndrome, cowden disease, muir-torre syndrome, and ataxia-telangiectasia) are also known to predispose to breast cancer. However, since all of these known breast cancer susceptibility genes together do not account for more than a minor fraction (1/5th at most) of breast cancer that clusters in families, it is clear that more breast cancer genes remain to be discovered. (12 Dec 1998) |
| familial cancer | <oncology> One occurring in families more frequently than would be expected by chance. (09 Oct 1997) |
| familial chylomicronemia syndrome | <endocrinology, syndrome> An inherited disorder resulting in accumulation of chylomicrons as well as triacylglycerols. See: chylomicronemia. (05 Mar 2000) |
| familial combined hyperlipemia | familial hyperlipoproteinemia |
| familial combined hyperlipidaemia | <biochemistry, endocrinology> Inherited as a defective gene, this disorder is characterised by elevations in serum cholesterol and/or triglycerides. There are often multiple types of lipoproteins (LDL) elevated in one family. This condition is associated with an increased risk of cardiovascular disease. (27 Sep 1997) |
| familial dysautonomia | <neurology, syndrome> A congenital syndrome with specific disturbances of the nervous system and aberrations in autonomic nervous system function such as indifference to pain, diminished lacrimation, poor vasomotor homeostasis, motor incoordination, labile cardiovascular reactions, hyporeflexia, frequent attacks of bronchial pneumonia, hypersalivation with aspiration and difficulty in swallowing, hyperemesis, emotional instability, and an intolerance for anaesthetics; autosomal recessive inheritance. Synonym: Riley-Day syndrome. (05 Mar 2000) |
| familial dysbetalipoproteinaemia | <biochemistry, cardiology> An inherited disorder (gene defect) where both cholesterol and triglycerides are elevated in the same patient. This condition accelerates the effects of atherosclerosis and thus increases the risk of cardiovascular disease. Conditions such as hypothyroidism, obesity and diabetes enhances this risk. Origin: Gr. Haima = blood (27 Sep 1997) |