Which type of necrosis preserves tissue outline and is typically seen in ischemic organs such as the heart and kidney?

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Multiple Choice

Which type of necrosis preserves tissue outline and is typically seen in ischemic organs such as the heart and kidney?

Coagulative necrosis is characterized by loss of cellular detail while the tissue’s architectural outlines are preserved. In ischemia, hypoxia causes ATP depletion and protein denaturation; the structural framework of cells and the extracellular matrix stays intact long enough that the tissue looks preserved, often forming a pale, wedge-shaped infarct in solid organs like the heart and kidney. The preserved outline reflects that proteolysis is limited early on, so while cells are dead, the overall structure remains recognizable until inflammatory cells clear the debris. Liquefactive necrosis, by contrast, involves enzymatic digestion that dissolves tissue, so architecture is lost and the area becomes gelatinous or cystic—typical in brain infarcts. Caseous necrosis yields a cheese-like, broken-down appearance with granulomatous inflammation, not preserved architecture. Fat necrosis arises from lipase activity on adipose tissue, producing chalky, saponified fat deposits, not preserved tissue outlines.

Coagulative necrosis is characterized by loss of cellular detail while the tissue’s architectural outlines are preserved. In ischemia, hypoxia causes ATP depletion and protein denaturation; the structural framework of cells and the extracellular matrix stays intact long enough that the tissue looks preserved, often forming a pale, wedge-shaped infarct in solid organs like the heart and kidney. The preserved outline reflects that proteolysis is limited early on, so while cells are dead, the overall structure remains recognizable until inflammatory cells clear the debris.

Liquefactive necrosis, by contrast, involves enzymatic digestion that dissolves tissue, so architecture is lost and the area becomes gelatinous or cystic—typical in brain infarcts. Caseous necrosis yields a cheese-like, broken-down appearance with granulomatous inflammation, not preserved architecture. Fat necrosis arises from lipase activity on adipose tissue, producing chalky, saponified fat deposits, not preserved tissue outlines.

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