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HM/CH-1/L-8
MORPHOLOGY OF CELL INJURY
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MORPHOLOGIC FORMS OF CELL INJURY
MECHANISMS1. Reversible cell injury2. Deranged cell
metabolism3. Irreversible cell
injury4. Programmed cell
death5. Residual effects6. After-effects
NOMENCLATURE1. Retrogressive
changes(degenerations)2. Intracellular
accumulations 3. Cell death-necrosis4. Apoptosis5. Subcellular alterations6. Gangrene, pathologic
calcification
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TYPES OF CELL DEATH AUTOLYSIS:
-Speed: rapid, intermediate, slow NECROSIS:
-Etiologic agents-Cell digestion by lytic enzymes, denaturation of proteins
APOPTOSIS:-Programmed cell death
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TYPES OF NECROSIS
Coagulative necrosis Liquefactive (colliquative) necrosis Caseous necrosis Fat necrosis Fibrinoid necrosis
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Coagulative necrosis
DefinitionGA
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Coagulative necrosisME
ME
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Liquefactive necrosis
Defintion GA & ME
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Caseous necrosis
Defintion GA
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Caseous necrosis: ME
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Fat necrosis
Definition GA, locations ME
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Fibrinoid necrosis
Definition Locations ME