| Albers-Schonberg disease | The formation of abnormally dense bone, as opposed to osteoporosis. (18 Nov 1997) |
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| Albert's disease | Achillobursitis involving inflammation of the bursa between the Achilles tendon and the os calcis. Synonym: Swediauer's disease. (05 Mar 2000) |
| Albright's disease | <syndrome> The abnormal development of multiple bones, hormonal disorder and brownish skin lesions. (27 Sep 1997) |
| aleutian mink disease | A slow progressive disease of mink caused by the aleutian mink disease virus. It is characterised by poor reproduction, weight loss, autoimmunity, hypergammaglobulinaemia, increased susceptibility to bacterial infections, and death from renal failure. The disease occurs in all colour types, but mink which are homozygous recessive for the aleutian gene for light coat colour are particularly susceptible. (12 Dec 1998) |
| aleutian mink disease virus | A species of parvovirus that causes a disease in mink, mainly those homozygous for the recessive aleutian gene which determines a desirable coat colour. (12 Dec 1998) |
| alexander disease | <radiology> Dysmyelinating disease, rare, sporadic, usually presents in 1st year, gradual enlargement of head (Differential diagnosis: Canavan disease), retardation, convulsion, spasticity CT findings: decreased density of white matter, frontal lobe predominance, with or without dilated lateral ventricles Diagnosis: brain biopsy (12 Dec 1998) |
| Alexander's disease | A rare, fatal central nervous system degenerative disease of infants, characterised by psychomotor retardation, seizures, and paralysis; megaloencephaly is associated with widespread leukodystrophic changes, especially in the frontal lobes. (05 Mar 2000) |
| alkali disease | A term applied to various animal poisonings of plant and mineral origin in arid regions under the belief that they were caused by the ingestion of alkaline waters; e.g., botulism of wild ducks, caused by feeding on decayed vegetation in nearly dried-up lakes. (05 Mar 2000) |
| Almeida's disease | <microbiology> A chronic fungal infection caused by Paracoccidioides brasiliensis. It is characterised by primary pulmonary lesions with dissemination to many visceral organs. Common findings include ulcerative granuloma lesions to the buccal mucosa (inner lining of the cheek) and nasal mucosa that extend to the surrounding skin. Generalised lymphangitis is also typical. More commonly seen in South America and the tropics. (15 Nov 1997) |
| Alpers disease | Familial progressive spastic paresis of extremities with progressive mental deterioration, with development of seizures, blindness and deafness, beginning during the first year of life, and with destruction and disorganization of nerve cells of the cerebral cortex. Synonym: Alpers disease, Christensen-Krabbe disease, progressive cerebral poliodystrophy. (05 Mar 2000) |
| alpha chain disease | A vague or indefinite term; could be used for alpha-heavy-chain disease (a lymphoplasma cell proliferative disease usually seen in Mediterranean men, characterised by intestinal involvement with steatorrhoea, often progressive with fatal outcome) or a thalassaemia (a genetic abnormality in the alpha globin chain of haemoglobin). (05 Mar 2000) |
| altitude disease | A condition that results from prolonged exposure to high altitude. Symptoms include a continuous dry cough, shortness of breath, poor exercise tolerance, dizziness, headache, sleep difficulty, anorexia, confusion, fatigue and a rapid pulse. Treatment includes the immediate movement to a lower altitude. Prophylaxis has been accomplished successfully with the use of acetazolamide (Diamox). (27 Sep 1997) |
| alzheimer disease | A degenerative organic mental disease characterised by progressive brain deterioration and dementia. The disease was originally described as dementia, presenile occurring in persons under the age of 65 (as opposed to dementia, senile with onset at or after 65); however, onset may occur at any age. There is no pathophysiological nor clinical distinction between the two stages of onset of alzheimer's. Women appear to be affected twice as frequently as men. It is characterised pathologically by the triad of senile plaques, neurofibrillary tangles, and neuropil threads. (12 Dec 1998) |
| Alzheimer's disease | <disease> A progressive, neurodegenerative disease characterised by loss of function and death of nerve cells in several areas of the brain leading to loss of cognitive function such as memory and language. The cause of nerve cell death is unknown but the cells are recognised by the appearance of unusual helical protein filaments in the nerve cells (neurofibrillary tangles) and by degeneration in cortical regions of brain, especially frontal and temporal lobes. Alzheimer's disease is the most common cause of dementia. (22 May 1997) |
| anaemia of chronic disease | <disease> A form of anaemia which develops as the result of a long-term infection or illness. Chronic diseases can interfere with red blood cell production in addition to shortening red blood cell life span in the body. Symptoms are largely due to the underlying disease. Haemoglobin and haematocrit are generally low. Iron studies may be low to normal. Red blood cell indices may usually normal. (27 Sep 1997) |