Colon and rectum

• colorectal pyloric gland metaplasia
  23 October 2020
• basal lymphoplasmocytosis
  23 October 2020
• villiform transformation of surface epithelium
  23 October 2020
• crypt shortening
  23 October 2020
• crypt branching
  23 October 2020
• crypt disarray
  23 October 2020
• mucosal crypt
  23 October 2020

  Pathology
  crypt anomalies crypt disarray crypt branching crypt shortening

• chronic inflammation in colorectal mucosa
  23 October 2020

  chronicity

• chronic inflmmatory cells within epithelium
  14 July 2020

  Examples
  microcopical colitis collagenous colitis lymphocytic colitis

• collagen thickening of subepithelial basement membrane
  14 July 2020

  Increase subepithelial collagen
  Images
  collagenous colitis https://twitter.com/smlungpathguy/status/853997959943528448 https://twitter.com/UJoneja/status/1282814698338111490
  Definition
  Patchy thickening of subepithelial basement membrane Increase subepithelial collagen thickness : 10 microns or more / 0.01 mm (thickest in transverse colon); often spares rectosigmoid; lower border of collagen is irregular, extends into lamina propria and encircles capillaries, may be difficult to (...)

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