Ureteral polypoid endometriosis causing hydroureteronephrosis

article OA: gold CC0 ⤵ 11 in-corpus citations
AI-generated summary by claude@2026-06, 2026-06-08

This case report describes a 44-year-old woman with left hydroureteronephrosis caused by a ureteral polypoid endometriosis lesion, treated successfully with partial ureter resection and ureteroneocystostomy.

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Abstract

A 44-year-old Japanese woman presented with a left low back pain. Abdominal ultrasonography revealed the left hydroureteronephrosis. She had the past history of endometriosis interna 3 years before. Retrograde pyelography showed the defect in the ureter, and on ureteroscopy, a polypoid mass was identified. Biopsy specimen from the ureteral mass showed endometrioid epithelia and edematous endometrial stroma, immunohistochemically positive for progesterone receptor (PgR), estrogen receptor (ER), and CD 10. For the lesion (endometrioma), partial resection of the ureter and ureteroneocystostomy with Boari flap were performed. The resected specimen showed a 2-cm polypoid mass. Histologically, the lesion was ureteral endometriosis. The postoperative course was uneventful, the patient showed no evidence of local recurrence after the initial resection and continues to be under close follow up. Urinary tract involvement of endometriosis is uncommon. Endometriosis should be included in the differential diagnosis of ureteral strictures in sexually active young females.

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Condition tags

endometriosisendometrioma

MeSH descriptors

Endometriosis Endometriosis Nephrosis Ureteral Neoplasms Ureteral Neoplasms Abdomen Abdomen Adult Asian People Biopsy Endometriosis Endometriosis Endometriosis Female Humans Kidney Kidney Ultrasonography Ureteral Neoplasms Ureteral Neoplasms

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Cited by (11)

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europepmc
last seen: 2026-06-11T06:19:48.454388+00:00
openalex
last seen: 2026-06-10T17:14:06.276822+00:00
pubmed
last seen: 2026-05-13T22:14:11.755070+00:00
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