| intermediate trait | A measurable trait in which there is some evidence of the operation of a simple major cause, but in which the variation within the putative categories is such as to cause overlap and hence ambiguity in classification of any particular reading. (05 Mar 2000) |
|---|---|
| threshold trait | A trait that falls into natural groups that originate not in categorically distinct causes but in whether or not the outcome attains critical values; e.g., gallstones may result from a categorical cause or from unusual levels of causal factors that themselves show no evidence of grouping. Synonym: liminal trait. (05 Mar 2000) |
| trait | A qualitative characteristic; a discrete attribute as contrasted with metrical character. A trait is amenable to segregation rather than quantitative analysis; it is an attribute of phenotype, not of genotype. Origin: Fr. From L. Tractus, a drawing out, extension (05 Mar 2000) |
| liminal trait | A trait that falls into natural groups that originate not in categorically distinct causes but in whether or not the outcome attains critical values; e.g., gallstones may result from a categorical cause or from unusual levels of causal factors that themselves show no evidence of grouping. Synonym: liminal trait. (05 Mar 2000) |
| Albright's hereditary osteodystrophy | An inherited form of hyperparathyroidism associated with ectopic calcification and ossification and skeletal defects, notably the small fourth metacarpals, but intelligence is normal. There are dominant, recessive and X-linked forms. See: pseudohypoparathyroidism. Synonym: Albright's syndrome. (05 Mar 2000) |
| angioedema, hereditary | A genetic form of angioedema. (Angioedema is also referred to as Quinke's disease.) Persons with it are born lacking an inhibitor protein (called C1 esterase inhibitor) that normally prevents activation of a cascade of proteins leading to the swelling of angioedema. Patients can develop recurrent attacks of swollen tissues, pain in the abdomen, and swelling of the voice box (larynx) which can compromise breathing. The diagnosis is suspected with a history of recurrent angioedema. It is confirmed by finding abnormally low levels of C1 esterase inhibitor in the blood. Treatment options include antihistamines and male steroids (androgens) that can also prevent the recurrent attacks. Also called hereditary angioneurotic oedema. (12 Dec 1998) |
| angioneurotic oedema, hereditary | A genetic form of angioedema. (Angioedema is also referred to as Quinke's disease.) Persons with it are born lacking an inhibitor protein (called C1 esterase inhibitor) that normally prevents activation of a cascade of proteins leading to the swelling of angioedema. Patients can develop recurrent attacks of swollen tissues, pain in the abdomen, and swelling of the voice box (larynx) which can compromise breathing. The diagnosis is suspected with a history of recurrent angioedema. It is confirmed by finding abnormally low levels of C1 esterase inhibitor in the blood. Treatment options include antihistamines and male steroids (androgens) that can also prevent the recurrent attacks. Also called hereditary angioedema. (12 Dec 1998) |
| canine hereditary blindness | An autosomal dominant condition seen in dogs of the collie and several other breeds. (05 Mar 2000) |
| colourectal neoplasms, hereditary nonpolyposis | A syndrome characterised by autosomal dominant inheritance, a low mean age (41 years) for occurrence of colon cancer, and a marked increase in the proportion of tumours in the proximal colon. (12 Dec 1998) |
| corneal dystrophies, hereditary | Bilateral hereditary disorders of the cornea, usually autosomal dominant, which may be present at birth but more frequently develop during adolescence and progress slowly throughout life. Central macular dystrophy is transmitted as an autosomal recessive defect. (12 Dec 1998) |
| hereditary | <genetics> Transferred via genes from parent to child. (16 Dec 1997) |
| hereditary 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) |
| hereditary angioedema | A genetic form of angioedema. (angioedema is also referred to as quinke's disease.) persons with it are born lacking an inhibitor protein (called c1 esterase inhibitor) that normally prevents activation of a cascade of proteins leading to the swelling of angioedema. Patients can develop recurrent attacks of swollen tissues, pain in the abdomen, and swelling of the voice box (larynx) which can compromise breathing. The diagnosis is suspected with a history of recurrent angioedema. It is confirmed by finding abnormally low levels of c1 esterase inhibitor in the blood. Treatment options include antihistamines and male steroids (androgens) that can also prevent the recurrent attacks. Also called hereditary angioneurotic oedema. (12 Dec 1998) |
| hereditary angioneurotic oedema | A genetic form of angioedema. (angioedema is also referred to as quinke's disease.) persons with it are born lacking an inhibitor protein (called c1 esterase inhibitor) that normally prevents activation of a cascade of proteins leading to the swelling of angioedema. Patients can develop recurrent attacks of swollen tissues, pain in the abdomen, and swelling of the voice box (larynx) which can compromise breathing. The diagnosis is suspected with a history of recurrent angioedema. It is confirmed by finding abnormally low levels of c1 esterase inhibitor in the blood. Treatment options include antihistamines and male steroids (androgens) that can also prevent the recurrent attacks. Also called hereditary angioedema. (12 Dec 1998) |
| hereditary angio oedema | <biochemistry> Condition in which there seems to be uncontrolled production of C2 kinin because of a deficiency in C1 inhibitor levels. (18 Nov 1997) |