Bladder & ureters
Acquired nonneoplastic anomalies
Endometriosis - ureters

Topic Completed: 1 June 2012

Revised: 12 June 2019

Copyright: 2002-2019,, Inc.

PubMed Search: Ureters endometriosis [title] "loattrfree full text"[sb]

Sean R. Williamson, M.D.
Page views in 2019 to date: 27
Cite this page: Williamson SR. Endometriosis - ureters. website. Accessed August 25th, 2019.
Definition / general
  • Rare in ureter but can result in renal failure due to silent obstruction
  • Associated with hydroureter / hydronephrosis
  • Tendency to involve distal third of left ureter (Hum Pathol 2008;39:954)
  • Extrinsic - involving serosal or peritoneal surface (adventitia or connective tissue)
  • Intrinsic - involving muscularis propria, lamina propria, lumen
  • Rarely malignant transformation or endometrial hyperplasia can be present
Case reports
Microscopic (histologic) description
  • Similar to endometriosis seen elsewhere, diagnosis based on the presence of endometrial glands (usually inactive or proliferative pattern) with endometrial stroma (usually normal appearing), sometimes restricted to a thin zone around the glandular component
  • Foamy or hemosiderin laden macrophages
  • Sometimes a fibrotic reaction
Microscopic (histologic) images

Images hosted on other servers:

Endometrial glands and
stroma involving the
adjacent soft tissue

Positive stains
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