Bladder, ureter & renal pelvis

Other nonneoplastic

Postoperative granulomas

Topic Completed: 1 December 2014

Minor changes: 12 November 2021

Copyright: 2003-2021,, Inc.

PubMed Search: Post operative granulomas [title]

Monika Roychowdhury, M.D.
Page views in 2020: 527
Page views in 2021 to date: 690
Cite this page: Roychowdhury M. Postoperative granulomas. website. Accessed December 4th, 2021.
Definition / general
  • May be due to metals deposited during diathermy, local reaction to tissue necrosis or hypersensitivity reaction (Urology 1990;35:454)
  • Includes “starch” granulomas (Urology 1976;8:507)
Microscopic (histologic) description
  • Palisading histiocytes or giant cells surrounding central necrosis (resembling rheumatoid nodules) or foreign body type granuloma
  • Lesions heal by fibrous scarring
Microscopic (histologic) images

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Differential diagnosis
  • Granulomatous cystitis: terms may overlap; often refers to patients with infectious etiology and no distinct mass
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