Hypertension Pathology · Pathology

What is the primary mechanism behind the development of 'Fibrinoid Necrosis' in malignant hypertension?

  1. Progressive accumulation of glycosaminoglycans
  2. Acute vascular injury with plasma protein leakage
  3. Chronic dystrophic calcification of the tunica media
  4. Replacement of smooth muscle with type III collagen
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Correct answer: Acute vascular injury with plasma protein leakage

Fibrinoid necrosis occurs in malignant hypertension when extreme blood pressure causes acute damage to the endothelium. This allows fibrin and other plasma proteins to leak into the vessel wall, resulting in a bright pink, necrotic appearance on H&E stain.

Difficulty: Medium Question 5 of 20

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