Category:Intestine - Inflammatory Pathology

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Inflammation of the Intestines

  • Inflammation involving small or large intestine is known as enteritis.
    • More specific segments may be involved, for example
      • Caecum - typhlitis
      • Colon - colitis
      • Rectum - proctitis
  • Enteritis is extremely common, and is usually associated with diarrhoea.
    • Diarrhoea is the passage of faeces with increased bulk and/or fluid content.
    • However, remember that enteritis may occur without diarrhoea, and diarrhoea can occur without enteritis!
  • There are very many causes of enteritis - some are outlined in this section.
    • Laboratory support is usually required for a comprehensive diagnosis, but we must try to narrow the diagnostic options.
    • Diagnosis is aided by noting:
      • Species
      • Age
      • Gross distribution of lesions- i.e. upper or lower small intestine.
      • The effects on the large intestine.
      • The type of mucosal pathology- both grossly and histologically.

Normal Intestinal Structure

  • The normal intestinal structure consists of:
    • The mucosa
      • In the small intestine, the epithelium forms villi and crypts.
        • Epithelium is continuously renewed.
      • Also has associated glands.
    • The lamina propria
      • Supportive tissue
    • The muscularis mucosae
    • The submucosa
    • Radial, and then longitudinal, muscle.
    • The serosa.

  • Damage due to enteritis results in morphological changes to the normal structure, e.g.
    • Villus atrophy.
    • Apparent elongation of the crypts.
    • Various types of inflammatory cell infiltration.
  • However, the bowel may remain morphologically normal in some diarrhoeaic conditions.
    • For example, in hypersecretory diarrhoea due to some bacterial toxins.

Types and Causes of Inflammation

  • As with other sections of the alimentary system, there several different types of inflammation that occur in the intestines.
  • Even quite mild inflammatory lesions can have quite severe effects, especially if they go on for any length of time.
  • The major pathological entities are outlined below.

Inflammation - Contents

Catarrhal Enteritis

Ulcerative Enteritis

Fibrinous/ Haemorrhagic Enteritis

Proliferative Enteritis

Granulomatous Enteritis

Inflammatory Bowel Disease And Related Conditions

Villus Atrophy

Genetic Conditions Causing Enteritis

Protein-Losing Diseases


This category has the following 2 subcategories, out of 2 total.

Pages in category "Intestine - Inflammatory Pathology"

The following 5 pages are in this category, out of 5 total.