| PVI | patient video interview; peripheral vascular insufficiency; perivascular infiltration; positron volu... |
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| RI | radiation intensity; radioactive isotope; radioimmunology; recession index; recombinant inbred [stra... |
| SRI | serotonin reuptake inhibitor; severe renal insufficiency; sorcin; Stanford Research Institute; struc... |
| TI | inversion time; temporal integration; terminal ileum; thalassemia intermedia; therapeutic index; tho... |
| UPI | uteroplacental insufficiency; uteroplacental ischemia |
| acute interstitial pneumonitis | Usually considered a form of hypersensitivity pneumonitis. (05 Mar 2000) |
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| acute kidney failure | <nephrology> A sudden decline in renal function may be triggered by a number of acute disease processes. Examples include sepsis (infection), shock, trauma, kidney stones, kidney infection, drug toxicity (aspirin or lithium), poisons or toxins (drug abuse) or after injection with an iodinated contrast dye (adverse effect). Chronic renal failure represents a slow decline in kidney function over time. Chronic renal failure may be caused by a number of disorders which include long-standing hypertension, diabetes, congestive heart failure, lupus or sickle cell anaemia. Both forms of renal failure result in a life-threatening metabolic derangement. (27 Sep 1997) |
| acute kidney transplant rejection | <radiology> Findings on ultrasound: globular enlargment of the kidney, swelling and hypoechogenicity of the medullary pyramids, indistinct cortico-medullary junction, foci in the renal cortex (12 Dec 1998) |
| acute leukaemia | <haematology> A rapidly progressive cancer of the blood of sudden onset and characterised by the uncontrolled proliferation of immature blood cells which take over the bone marrow and spill into the blood stream. If left untreated is fatal within a few weeks or months. See: acute lymphoblastic leukaemia, acute myeloid leukaemia. Origin: Gr. Haima = blood (11 Nov 1997) |
| acute lobar nephrosis | A severe but localised bacterial infection of the renal parenchyma that may produce a mass effect simulating a renal abscess. (05 Mar 2000) |
| acute lower GI haemorrhage | <gastroenterology> Typical presentation: Sudden onset of brisk rectal bleeding without blood in gastric aspirate Diagnostic considerations: diverticulosis, angiodysplasia, ischemic colitis, inflammatory bowel disease (rarely), polyps are usually present, carcinoma causing a chronic bleed, haemorrhoids. (12 Dec 1998) |
| acute lymphoblastic leukaemia | <haematology> A rapidly progressing cancer of the blood affecting the type of white blood cell known as lymphocytes. Approximately 650 new cases are diagnosed every year in the UK and it is the most common form of childhood leukaemia. Acronym: ALL Origin: Gr. Haima = blood (11 Nov 1997) |
| acute lymphocytic leukaemia | <radiology> 95% of cases of leukaemia in children, bone changes in 50-70% of kids (vs. 10% in adults); seen as early as 1 month after onset of symptoms, wrists and knees most commonly affected, bony defects: metaphyseal radiolucent bands! (similar findings in scurvy, JRA, syphilis), osteolytic lesions, periosteal reaction, osteosclerosis (12 Dec 1998) |
| acute malaria | A form of malaria that may be intermittent or remittent, consisting of a chill accompanied and followed by fever with its attendant general symptoms, and terminating in a sweating stage; the paroxysms, caused by release of merozoites from infected cells, recur every 48 hours in tertian (vivax or ovale) malaria, every 72 hours in quartan (malariae) malaria, and at indefinite but frequent intervals, usually about 48 hours, in malignant tertian (falciparum) malaria. (05 Mar 2000) |
| acute mania | An excited mental state seen in a bipolar (manic-depressive) disorder characterised by hyperactivity, talkativeness, flight of ideas, pressured speech, grandiosity, and, occasionally, grandiose delusions. See: mania, manic-depressive. Synonym: acute mania. (05 Mar 2000) |
| acute miliary tuberculosis | A rapidly fatal disease due to the general dissemination of tubercle bacilli in the blood, resulting in the formation of miliary tubercles in various organs and tissues, and producing symptoms of profound toxaemia. Synonym: acute miliary tuberculosis, disseminated tuberculosis. (05 Mar 2000) |
| acute monocytic leukaemia | <haematology> The most common translocation in this disorder of poorly differentiated monocytic cells involves chromosome region 11q in a large percentage of cases. The translocation involves a cellular oncogene, c-ets which is mapped to the 11q23-24 region. The most common translocations reported are t(6;11), t(9;11), t(11;17) and t(11;19), of which t(9;11) (p21-22;q23) is by far the most frequently detected and implicated in acute myeloid leukaemia. The cells express CD14 surface antigen, which is diagnostic of monocytic cells. Acronym: AML Classification: FAB M5 (07 Apr 1998) |
| acute mountain sickness | <chest medicine> 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) |
| acute myeloblastic leukaemia | <haematology> A rapidly progressing cancer of the blood affecting immature cells of the bone marrow, usually of the white cell population. It is much more common in adults than in children. Symptoms include fatigue, weight loss, fevers, weakness, pallor, bone pains, bleeding gums, nosebleeds, easy bruising, enlarged lymph nodes and joint pains. Treatment includes chemotherapy and/or bone marrow transplant. This leukaemia demonstrates granulocyte differentiation, eosinophilia and Auer rods and is associated with a reciprocal translocation between 8 and 21 (q22;q22), which is the most common translocation in acute myeloid leukaemia and is found more often in younger patients than in older patients. The oncogene involved in this translocation is AML1, which can be detected by Southern blot. Numerical abnormalities, particularly monosomy-7, trisomy-4, trisomy-8, trisomy-21, -Y, monosomy-7 and deletions of the long arms of chromosomes 5 and 7 are quite common in all acute myeloid leukaemia and not restricted to any one FAB classification. Many of these abnormalities are observed at diagnosis and at later stage disease, particularly after chemotherapy. Prognosis is generally more favorable than in FAB-M2 patients showing no translocation, because the latter patients show better remission rates for longer periods of time. Immunophenotyping is useful in diagnosis and expression of one or more of the myeloid antigens CD13, CD14 or CD33 must be detected to make a diagnosis of acute myeloid leukaemia. Acronym: AML Incidence: 2,000 new cases per year in the UK. Origin: Gr. Haima = blood (07 Apr 1998) |
| acute myelogenous leukaemia | <haematology> A rapidly progressing cancer of the blood affecting immature cells of the bone marrow, usually of the white cell population. It is much more common in adults than in children. Symptoms include fatigue, weight loss, fevers, weakness, pallor, bone pains, bleeding gums, nosebleeds, easy bruising, enlarged lymph nodes and joint pains. Treatment includes chemotherapy and/or bone marrow transplant. This leukaemia demonstrates granulocyte differentiation, eosinophilia and Auer rods and is associated with a reciprocal translocation between 8 and 21 (q22;q22), which is the most common translocation in acute myeloid leukaemia and is found more often in younger patients than in older patients. The oncogene involved in this translocation is AML1, which can be detected by Southern blot. Numerical abnormalities, particularly monosomy-7, trisomy-4, trisomy-8, trisomy-21, -Y, monosomy-7 and deletions of the long arms of chromosomes 5 and 7 are quite common in all acute myeloid leukaemia and not restricted to any one FAB classification. Many of these abnormalities are observed at diagnosis and at later stage disease, particularly after chemotherapy. Prognosis is generally more favorable than in FAB-M2 patients showing no translocation, because the latter patients show better remission rates for longer periods of time. Immunophenotyping is useful in diagnosis and expression of one or more of the myeloid antigens CD13, CD14 or CD33 must be detected to make a diagnosis of acute myeloid leukaemia. Acronym: AML Incidence: 2,000 new cases per year in the UK. Origin: Gr. Haima = blood (07 Apr 1998) |