| 释义 |
DictionarySeenecrosisliquefactive necrosis
necrosis [nĕ-kro´sis, ne-kro´sis] (Gr.) the morphological changes indicative of cell death caused by enzymatic degradation.aseptic necrosis necrosis without infection or inflammation.acute tubular necrosis acute renal failure with mild to severe damage or necrosis of tubule cells, usually secondary to either nephrotoxicity, ischemia after major surgery, trauma (see crush syndrome), severe hypovolemia, sepsis, or burns. See also lower nephron nephrosis.Balser's fatty necrosis gangrenous pancreatitis with omental bursitis and disseminated patches of necrosis of fatty tissues.bridging necrosis septa of confluent necrosis bridging adjacent central veins of hepatic lobules and portal triads characteristic of subacute hepatic necrosis.caseous necrosis caseation (def. 2).central necrosis necrosis affecting the central portion of an affected bone, cell, or lobule of the liver.cheesy necrosis caseation (def. 2).coagulation necrosis death of cells, the protoplasm of the cells becoming fixed and opaque by coagulation of the protein elements, the cellular outline persisting for a long time.colliquative necrosis liquefactive necrosis.fat necrosis necrosis in which fat is broken down into fatty acids and glycerol, usually occurring in subcutaneous tissue as a result of trauma.liquefactive necrosis necrosis in which the necrotic material becomes softened and liquefied.massive hepatic necrosis massive, usually fatal, necrosis of the liver, a rare complication of viral hepatitis (fulminant hepatitis) that may also result from exposure to hepatotoxins or from drug hypersensitivity.moist necrosis necrosis in which the dead tissue is wet and soft.postpartum pituitary necrosis see postpartum pituitary necrosis.selective myocardial cell necrosis myofibrillar degeneration.subcutaneous fat necrosis of newborn a benign, self-limited disease affecting term newborns and young infants, characterized by circumscribed, indurated, nodular areas of fat necrosis. It is thought to be related to trauma on bony prominences during delivery, hypothermia, asphyxia, or maternal diabetes; it usually resolves spontaneously by 2 to 4 weeks with no scarring. Called also adiponecrosis neonatorum or subcutanea.Zenker's necrosis degeneration" >hyaline degeneration and necrosis of striated muscle; called also Zenker's degeneration.liq·ue·fac·tive ne·cro·sisa type of necrosis characterized 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.liq·ue·fac·tive ne·cro·sis (lik'wĕ-fak'tiv nĕ-krō'sis) A type of tissue death characterized by dull, opaque, partly or completely fluid remains of tissue. It is observed in abscesses and frequently in infarcts of the brain. necrosis (ne-kro'sis) ('sez?) plural.necroses [Gr. nekrosis, (state of) death]  NECROSIS: Necrotic wound of the footThe death of cells, tissues, or organs. Necrosis may be caused by insufficient blood supply, pathogenic microorganisms, physical agents such as trauma or radiant energy (electricity, infrared, ultraviolet, roentgen, and radium rays), and chemical agents acting locally, acting internally after absorption, or placed into the wrong tissue. Some medicines cause necrosis if injected into the tissues rather than the vein, and some, such as iron dextran, cause necrosis if injected into areas other than deep muscle or vein. See: illustration; gangrene; mortificationnecrotizing (nek'ro-tiz?ing), adjectiveacute esophageal necrosisNecrotizing esophagitis.acute tubular necrosis Abbreviation: ATN
Acute damage to the renal tubules; usually due to ischemia associated with shock. See: acute renal failureanemic necrosisNecrosis due to inadequate blood flow to a body part.aseptic necrosisNecrosis without infection, e.g., as a result of trauma or drug use.avascular necrosisOsteonecrosis.Balser fatty necrosis See: Balser fatty necrosiscaseous necrosisNecrosis with soft, dry, cheeselike formation, seen in diseases such as tuberculosis or syphilis. Synonym: cheesy necrosiscentral necrosisNecrosis that affects only the center of a body part.cheesy necrosisCaseous necrosis.coagulation necrosisNecrosis occurring esp. in infarcts. Coagulation occurs in the necrotic area, converting it into a homogeneous mass and depriving the organ or tissue of blood. Synonym: fibrinous necrosis; ischemic necrosiscolliquative necrosisNecrosis caused by liquefaction of tissue due to autolysis or bacterial putrefaction. Synonym: liquefactive necrosisdry necrosisDry gangrene.embolic necrosisNecrosis due to an embolic occlusion of an artery. fat necrosisNecrosis of fatty tissues, seen, for example, in patients with severe cases of pancreatitis.fibrinous necrosisCoagulation necrosis.focal necrosisNecrosis in small scattered areas, often seen in infection.gummatous necrosisNecrosis forming a dry rubbery mass resulting from syphilis.ischemic necrosisCoagulation necrosis.liquefactive necrosisColliquative necrosis.medial necrosisNecrosis of cells in the tunica media of an artery. moist necrosisNecrosis with softening and wetness of the dead tissue.postpartum pituitary necrosisSheehan syndrome.putrefactive necrosisNecrosis due to bacterial decomposition. radiation necrosisNecrosis caused by radiation exposure. subcutaneous fat necrosis of newbornAn inflammatory disorder of unknown cause affecting fat tissue that may occur in the newborn at the site of application of forceps during delivery and occasionally in premature infants. superficial necrosisNecrosis affecting only the outer layers of bone or any tissue.thrombotic necrosisNecrosis due to thrombus formation. total necrosisNecrosis affecting an entire organ or body part. Zenker necrosis See: Zenker, Friedrich Albert von |