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Friday, January 14, 2011

Histology and explanation of Acute Inflamation

Acute inflammation (exudative inflammation) is the immediate and early defensive response in the host, to all forms of injury. The main characteristic feature is the inflammatory infiltrate (exudate), which consists in: plasma liquid, plasma proteins, leukocytes, red blood cells and, sometimes, infective germs.

Depending on the etiology, localization and composition, exudative inflammation can be :

  • serous (first stage of lobar pneumonia, vesicles in herpetic infections or burns)
  • fibrinous (second stage of lobar pneumonia, fibrinous pericarditis, peritonitis or pleuresia, pseudomembranous colitis)
  • sero-fibrinous (the mixed form of previous two)
  • chataral (inflammation of mucus secreting mucosa from digestive or respiratory tract)
  • purulent or suppurative (localized - abscess and folliculitis or diffuse - phlegmon or cellulitis, erysipelas, purulent meningitis, phlegmonous cholecistitis/appendicitis)
Some Examples are as follows
  1. Fibrinous Pericarditis
  2. Purulent Meningitis
  3. abscess (brain)
  4. acute Pyelonephritis

Related Posts:

  • Histology and Explanation of Brain abscessAbscess is an exudative purulent localized inflammation. In the white matter, a recent abscess consisting in pus : neutrophils (normal or in lisis), fibrin, necrotic debris, germs. Vessels present congestion and important per… Read More
  • Histology and Explanation of Squamous cell PapillomaSquamous cell papilloma (verruca vulgaris) is a benign epithelial tumor. Tumor cells proliferate and produce finger-like or warty projections; secondary, the subjacent vessels and connective tissue (fibrovascular core) grows … Read More
  • Histology and Explanation of acute PyelonephritisAcute pyelonephritis is an exudative purulent localized inflammation of kidney and renal pelvis. The renal parenchyma presents in the interstitium abscesses (suppurative necrosis), consisting in purulent exudate (pus): neutro… Read More
  • Histology and Explanation of Purulent MeningitisPurulent leptomeningitis (suppurative leptomeningitis) is a diffuse purulent inflammation. The leptomeninges (arachnoida and piamater) contain purulent exudate (pus): leukocytes (neutrophils), fibrin, germs, proteins, necroti… Read More
  • Histology and Classification of TumorsNeoplasia (tumors) are abnormal tissue proliferations, which develop exceeding normal tissue, uncoordinated with it. This uncontrolled tissue growing may continue even after cessation of the etiologic factor (self-maintaine… Read More

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