Colon tumor
Polyps
Displaced glands / pseudoinvasion of colon

Authors: Shilpa Jain, M.D. (see Authors page)

Revised: 9 December 2016, last major update August 2011

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PubMed Search: pseudoinvasion colon

Cite this page: Displaced glands / pseudoinvasion of colon. PathologyOutlines.com website. http://pathologyoutlines.com/topic/colontumordisplaced.html. Accessed November 18th, 2017.
Clinical features
  • Also called epithelial misplacement
  • Presence of dysplastic glands from an adenoma beneath the muscularis mucosa due to biopsy related torsion or other trauma
  • A low power diagnosis
  • Occurs in 3% of adenomas, usually with well defined stalks
  • Resembles intramucosal carcinoma but cytologic features resemble adenoma
  • See also hyperplastic polyp with misplaced epithelium
Microscopic (histologic) description
  • Submucosal glands surrounded by loose inflamed stroma and granulation tissue but not desmoplastic stroma
  • Glands may have atypia associated with adenoma but not carcinoma