Appendix
Appendicitis
Malakoplakia

Reviewer: Jaleh Mansouri, M.D. (see Authors page)

Revised: 16 February 2016, last major update August 2012

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PubMed Search: Malakoplakia appendix
Cite this page: Malakoplakia. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/appendixmalakoplakia.html. Accessed December 5th, 2016.
Definition / General
  • Unusual in appendix (< 10 cases reported); commonly involves bladder
  • At all sites, associated with tumors (lymphoma, colonic tumors), infections (TB, fungi), sarcoidosis, immunocompromise (malnutrition, diabetes, alcoholic liver disease, steroids)
Case Reports
Micro Description
  • Infiltrate of large granular eosinophilic macrophages with concentrically laminated siderocalcific Michaelis-Gutmann (MG) bodies
Micro Images

Images hosted on other servers:

Various images

Electron Microscopy Description
  • Concentric crystalline laminations with dense inner zone containing partially digested bacteria and thin outer zone