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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.
a 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]
The 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), adjective
acute esophageal necrosisNecrotizing esophagitis.
acute tubular necrosisAbbreviation: ATN
Acute damage to the renal tubules; usually due to ischemia associated with shock.See: acute renal failure
Necrosis due to inadequate blood flow to a body part.
Necrosis without infection, e.g., as a result of trauma or drug use.
Balser fatty necrosisSee: Balser fatty necrosis
Necrosis with soft, dry, cheeselike formation, seen in diseases such as tuberculosis or syphilis. Synonym: cheesy necrosis
Necrosis that affects only the center of a body part.
cheesy necrosisCaseous necrosis.
Necrosis 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 necrosis
Necrosis caused by liquefaction of tissue due to autolysis or bacterial putrefaction. Synonym: liquefactive necrosis
dry necrosisDry gangrene.
Necrosis due to an embolic occlusion of an artery.
Necrosis of fatty tissues, seen, for example, in patients with severe cases of pancreatitis.
fibrinous necrosisCoagulation necrosis.
Necrosis in small scattered areas, often seen in infection.
Necrosis forming a dry rubbery mass resulting from syphilis.
ischemic necrosisCoagulation necrosis.
liquefactive necrosisColliquative necrosis.
Necrosis of cells in the tunica media of an artery.
Necrosis with softening and wetness of the dead tissue.
postpartum pituitary necrosisSheehan syndrome.
Necrosis due to bacterial decomposition.
Necrosis caused by radiation exposure.
subcutaneous fat necrosis of newborn
An 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.
Necrosis affecting only the outer layers of bone or any tissue.
Necrosis due to thrombus formation.
Necrosis affecting an entire organ or body part.