| PP | diphosphate group; emphysema [pink puffers]; near point of accommodation [Lat. punctum proximum]; pa... |
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| PPM | permanent pacemaker; phosphopentomutase; physician practice management; pigmented pupillary membrane... |
| PTC | papillary thyroid carcinoma; percutaneous transhepatic cholangiography; phase transfer catalyst; phe... |
| RCCP | renal cell carcinoma, papillary |
| SAX-PM | short-axis plane, papillary muscle |
pressure necrosis
| tumour necrosis factor | <cytokine> Originally described as a tumour inhibiting factor in the blood of animals exposed to bacterial lipopolysaccharide or Bacille Calmette-Guerin. Preferentially kills tumour cells in vivo and in vitro, causes necrosis of certain transplanted tumours in mice and inhibits experimental metastases. Human Tumour Necrosis factor alpha is a protein of 157 amino acids and has a wide range of pro inflammatory actions. Usually considered a cytokine. Synonym: cachectin. Acronym: TNF (13 Nov 1997) |
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| tumour necrosis factor-beta | <cytokine> A cytolytic factor that is produced by CD4 and CD8 T-cells after their exposure to an antigen. (05 Mar 2000) |
| fat necrosis | A condition in which the neutral fats in the cells of adipose tissue are split into fatty acids and glycerol. (12 Dec 1998) |
| fat necrosis tumour | <surgery> Destruction of fat cells in the breast due to trauma or injury that can cause a hard noncancerous lump. (09 Oct 1997) |
| Zenker's necrosis | A form of severe hyaline degeneration or necrosis in skeletal muscle, occurring in severe infections. Synonym: waxy degeneration, Zenker's necrosis. (05 Mar 2000) |
| zonal necrosis | Necrosis predominantly affecting or limited to an anatomical zone, especially parts of the hepatic lobules defined according to proximity to either the portal tracts or central (hepatic) veins. (05 Mar 2000) |
| femur head necrosis | Aseptic or avascular necrosis of the femoral head. The major types are idiopathic (primary), as a complication of fractures or dislocations, and legg-perthes disease. (12 Dec 1998) |
| fibrinoid necrosis | Necrosis in which the necrotic tissue has some staining reactions resembling fibrin and becomes deeply eosinophilic, homogenous, and refractile. (05 Mar 2000) |
| focal necrosis | Occurrence of numerous, relatively small or tiny, fairly well-circumscribed, usually spheroidal portions of tissue that manifest coagulative, caseous, or gummatous necrosis and are characteristically associated with agents that are haematogenously disseminated; frequently observed only in histologic sections, but the foci may be as large as 1 to 3 mm and macroscopically visible; arbitrarily, foci larger than that are usually not termed focal necrosis. (05 Mar 2000) |
| laminar cortical necrosis | The breaking down of a definite cell layer in the cerebral cortex, encountered typically after temporary cardiac arrest or perinatal hypoxia. (05 Mar 2000) |
| liquefactive necrosis | A type of necrosis characterised by a fairly well-circumscribed, microscopically or macroscopically visible lesion that consists of the dull, opaque or turbid, gray-white to yellow-gray, soft or boggy, partly or completely fluid remains of tissue that became necrotic and was digested by enzymes, especially proteolytic enzymes liberated from disintegrating leukocytes; it is classically observed in abscesses, and frequently in infarcts of the brain. (05 Mar 2000) |
| 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) |
| african green monkey kidney cell | <cell culture> Cells taken from the kidneys of the African green monkey Cercopithecus aethiops sabaeus and used to grow certain viruses like poliovirus. (05 Feb 1998) |
| amyloid kidney | A kidney in which amyloidosis has occurred, usually in association with some chronic illness such as multiple myeloma, tuberculosis, osteomyelitis, or other chronic suppurative inflammation; such kidney's are moderately enlarged and grossly manifest a waxy appearance, with amyloid deposited beneath the endothelium in the glomerular loops and in the arterioles, apparently beginning as foci of thickening of the basement membranes. Synonym: waxy kidney. (05 Mar 2000) |