| type I diabetes | A chronic condition in which the pancreas makes little or no insulin because the beta cells have been destroyed. The body is then not able to use the glucose (blood sugar) for energy. IDDM usually comes on abruptly, although the damage to the beta cells may begin much earlier. The signs of IDDM are a great thirst, hunger, a need to urinate often, and loss of weight. To treat the disease, the person must inject insulin, follow a diet plan, exercise daily, and test blood glucose several times a day. IDDM usually occurs in children and adults who are under age 30. This type of diabetes used to be known as juvenile diabetes, juvenile-onset diabetes, and ketosis-prone diabetes. (09 Oct 1997) |
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| type I diabetes mellitus | <endocrinology> A severe metabolic disorder which has an abrupt onset before the age of twenty. In it, an insulin deficiency prevents the body from using carbohydrates properly and forces it to rely mainly on protein metabolism. Treatment of the disease includes strict dietary regulation and mandatory insulin injections. (09 Oct 1997) |
| type I dip | Early deceleration of the foetal heart rate at the height of uterine contraction, as displayed on a foetal monitor graph. (05 Mar 2000) |
| type i error | The statistical error (said to be of the first kind or alpha error) made in testing an hypothesis when it is concluded that a treatment or intervention is effective when it really is not. Sometimes referred to as a false positive. (12 Dec 1998) |
| type I familial hyperlipoproteinaemia | Hyperlipoproteinaemia characterised by the presence of large amounts of chylomicrons and triglycerides in the plasma when the patient has a normal diet, and their disappearance on a fat-free diet; low alpha-and beta-lipoproteins on a normal diet, with increase on fat-free diet; decreased plasma postheparin lipolytic activity; and low tissue lipoprotein lipase activity. It is accompanied by bouts of abdominal pain, hepatosplenomegaly, pancreatitis, and eruptive xanthomas; autosomal recessive inheritance. See: familial lipoprotein lipase inhibitor. Synonym: Burger-Grutz syndrome, familial fat-induced hyperlipaemia, familial hyperchylomicronaemia, familial hypertriglyceridemia, idiopathic hyperlipaemia. (05 Mar 2000) |
| type IH mucopolysaccharidosis | <syndrome> Mucopolysaccharidosis in which there is a deficiency of alpha-l-iduronidase, an accumulation of an abnormal intracellular material, and excretion of dermatan sulfate and heparan sulfate in the urine; with severe abnormality in development of skeletal cartilage and bone, with dwarfism, kyphosis, deformed limbs, limitation of joint motion, spadelike hand, corneal clouding, hepatosplenomegaly, mental retardation, and gargoyle-like facies; autosomal recessive inheritance. See: mucolipidosis. Synonym: dysostosis multiplex, Hurler's disease, lipochondrodystrophy, Pfaundler-Hurler syndrome, type IH mucopolysaccharidosis. (05 Mar 2000) |
| type I H/S mucopolysaccharidosis | <syndrome> Although clinically distinct diseases, fibroblasts from patients with Hurler syndrome and with Scheie syndrome do not cross complement in culture, suggesting that the enzyme defect is the same. (18 Nov 1997) |
| type I hyperlipoproteinaemia | <biochemistry> An rare inherited disorder where there is a deficiency of an enzyme (lipoprotein lipase) which breaks down fat molecules, causing the accumulation of fats or lipoproteins in the blood. Symptoms in infancy include abdominal pain (appears as if its colic), failure to thrive and skin lesions (xanthomas). Origin: Gr. Haima = blood (27 Sep 1997) |
| type I interferon | <chemical> Interferon secreted by leukocytes, fibroblasts, or lymphoblasts in response to viruses or interferon inducers other than mitogens, antigens, or allo-antigens. They include alpha- and beta-interferons (interferon-alpha and interferon-beta). Pharmacological action: antineoplastic agent, antiviral agents. (12 Dec 1998) |
| type I mortality | <epidemiology> A mortality schedule in which all hosts are assumed to live for a fixed number of years equal to the life expectancy. (05 Dec 1998) |
| type IS mucopolysaccharidosis | <syndrome> A hereditary metabolic disorder caused by a recessive gene which results in a deficiency of the enzyme alpha-L-iduronidase, which breaks down dermatan sulphate and heparan sulphate, two types of mucopolysaccharides (complex carbohydrates). Consequently, the mucopolysaccharides accumulate in the cells of the body and cause damage. Symptoms include skeletal deformities, mental retardation, coronary artery disease, deafness, and stiff joints, among other things. There are mild and severe forms of the syndrome, the severe form is called Hurler syndrome, the mild form is called Scheie Syndrome, and children with an intermediate form have Hurler-Scheie Syndrome. Patients with the mild form generally suffer little to no mental retardation and survive to adulthood. There is presently no cure. Scheie's Syndrome is one of a number of related rare genetic mucopolysaccharide disorders, the most common being Hunter syndrome. (09 Oct 1997) |
| type IVA,B mucopolysaccharidosis | <syndrome> An error of mucopolysaccharide metabolism with excretion of keratan sulfate in urine; characterised by severe skeletal defects with short stature, severe deformity of spine and thorax, long bones with irregular epiphyses but with shafts of normal length, enlarged joints, flaccid ligaments, and waddling gait; autosomal recessive inheritance; type IV A mucopolysaccharidosis is due to an absence of galactose-1-sulfatase, while type IV B is due to a deficiency of a beta-galactosidase. Synonym: Brailsford-Morquio disease, Morquio's disease, Morquio-Ullrich disease, type IVA, B mucopolysaccharidosis. (05 Mar 2000) |
| type IV acrocephalosyndactyly | Acrocephalosyndactyly with pointed nose, hypertelorism, cleft palate, congenital heart disease and pseudohermaphroditism; contractures of elbows and knees; soft tissue syndactyly, absent first metatarsal and great toe. Autosomal recessive. (05 Mar 2000) |
| type IV collagen | A less distinctly fibrillar form of collagen characteristic of basement membranes. (05 Mar 2000) |
| type IV familial hyperlipoproteinaemia | Plasma levels of VLDL, pre-beta-lipoproteins and triglycerides are increased on a normal diet, but beta-lipoproteins, cholesterol, and phospholipids are normal; hypertriglyceridemia is induced by a high carbohydrate diet; may be accompanied by abnormal glucose tolerance and susceptibility to ischemic heart disease; probably autosomal recessive inheritance. Synonym: carbohydrate-induced hyperlipaemia, familial hyperprebetalipoproteinaemia, familial hypertriglyceridemia. (05 Mar 2000) |