| OHS | obesity hypoventilation syndrome; occipital Horn syndrome; occupational health service; ocular histo... |
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| PDH | past dental history; phosphate dehydrogenase; position-of-the-dynamometer-handle [test]; progressive... |
| POHS | presumed ocular histoplasmosis syndrome |
| TRASHES | tuberculosis, radiotherapy, ankylosing spondylitis, histoplasmosis, extrinsic allergic alveolitis, s... |
| CPH | Certificate in Public Health; chronic paroxysmal hemicrania; chronic persistent hepatitis; chronic p... |
| chronic African sleeping sickness | A chronic disease of humans caused by Trypanosoma brucei gambiense in northern and sub-Saharan Africa from Senegal east to Sudan and Uganda; characterised by splenomegaly, drowsiness, an uncontrollable urge to sleep, and the development of psychotic changes; basal ganglia and cerebellar involvement commonly lead to chorea and athetosis; the terminal phase of the disease is characterised by wasting, anorexia, and emaciation that gradually leads to coma and death, usually from intercurrent infection. Synonym: chronic African sleeping sickness, chronic trypanosomiasis, West African sleeping sickness, West African trypanosomiasis. (05 Mar 2000) |
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| chronic alcoholism | A pathologic condition, affecting chiefly the nervous and gastroenteric systems, associated with impairment in social and occupational functioning, caused by the habitual use of alcoholic beverages in toxic amounts. See: gamma alcoholism. (05 Mar 2000) |
| chronic allograft rejection | Immunologically mediated damage to the allograft, typically a kidney allograft, manifested by diffuse interstitial fibrosis glomerular changes, typically membranous and sclerotic in nature, as well as intimal fibrosis of the blood vessels with tubular atrophy and loss of tubular structures. (05 Mar 2000) |
| chronic anaphylaxis | A haemorrhagic and necrotizing inflammation developing in the ileum (and also the colon) of sensitised dogs when they are fed a second dose of the sensitizing material. Synonym: chronic anaphylaxis. (05 Mar 2000) |
| chronic anterior poliomyelitis | Muscular atrophy of the upper extremities and neck, in which there are long intermissions of quiescence or improvement; not to be confused with poliomyelitis virus infections. (05 Mar 2000) |
| chronic appendicitis | Fibrous adhesions, scarring, or deformity of the appendix following subsidence of acute appendicitis; fibrous obliteration of the distal lumen is not abnormal in older persons; term frequently used to refer to repeated mild attacks of acute appendicitis. (05 Mar 2000) |
| chronic ataxia | Persistent ataxia, most often caused by hereditary cerebellar or metabolic disorders. (05 Mar 2000) |
| chronic atrophic polychondritis | A degenerative disease of cartilage producing a bizarre form of arthritis, with collapse of the ears, the cartilaginous portion of the nose, and the tracheobronchial tree; death may occur from chronic infection or suffocation because of loss of stability in the tracheobronchial tree of autosomal origin. Synonym: chronic atrophic polychondritis, generalised chondromalacia, Meyenburg's disease, Meyenburg-Altherr-Uehlinger syndrome, relapsing perichondritis, systemic chondromalacia, von Meyenburg's disease. (05 Mar 2000) |
| chronic atrophic thyroiditis | Replacement of the thyroid gland by fibrous tissue, the commonest cause of myxoedema in older persons. (05 Mar 2000) |
| chronic atrophic vulvitis | An inflammation of atrophic vulvar skin, usually with severe pruritus. (05 Mar 2000) |
| chronic bacillary diarrhoea | Prolonged diarrhoea occurring in association with bacterial infection, usually occurring in patients with gastrointestinal stasis, allowing bacterial proliferation in the intestine with secondary malabsorption. Occurs in blind-loop syndrome after intestinal surgery, following vagotomy, and occasionally in scleroderma or diabetes. (05 Mar 2000) |
| chronic bronchitis | A condition of the bronchial tree characterised by cough, hypersecretion of mucus, and expectoration of sputum over a long period of time, associated with frequent bronchial infection; usually due to inhalation, over a prolonged period, of air contaminated by dust or by noxious gases of combustion. (05 Mar 2000) |
| chronic bullous dermatosis of childhood | A rare self-limiting bullous disease, chiefly of the trunk, perioral, and pelvic areas, with onset in the first decade, successively less severe recurrences, and total remission at adolescence; linear epidermal basement membrane zone deposit of IgA is found in involved and in normal skin. Synonym: linear IgA bullous disease in children. (05 Mar 2000) |
| chronic cholecystitis | <radiology> most common form of gallbladder inflammation, gallstones, gallbladder wall thickening, small gallbladder hepatobiliary scan: normal gall bladder visualization in most patients, delayed gall bladder visualization; visualization of bowel before gall bladder (sensitivity 45%, specificity 90%), noncontractility/decreased response after CCK (12 Dec 1998) |
| chronic cicatrizing enteritis | A subacute chronic enteritis, of unknown cause, involving the terminal ileum and less frequently other parts of the gastrointestinal tract; characterised by patchy deep ulcers that may cause fistulas, and narrowing and thickening of the bowel by fibrosis and lymphocytic infiltration, with noncaseating tuberculoid granulomas that also may be found in regional lymph nodes; symptoms include fever, diarrhoea, cramping abdominal pain, and weight loss. Synonym: chronic cicatrizing enteritis, Crohn's disease, distal ileitis, regional ileitis, terminal ileitis, granulomatous enteritis. (05 Mar 2000) |