Upper tract urothelial carcinoma arising in a horseshoe kidney with ureteropelvic junction obstruction: a case report.

Ahmed Chaabouni, Wafa Elleuch, Kays Chaker, Houcine Bouchaala, Yassine Nouira, Mourad Hadj Slimen

Abstract readCase Reports

In one paragraph

Article in Urology case reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

6 authors.

Ahmed ChaabouniUrology Department, Habib Bourguiba Hospital, Sfax, Tunisia.

Wafa ElleuchPedagogy Committee of the Faculty of Medicine of Sfax, Physical Medecine and Rehabilitation Department, Military Hospital, Sfax, Tunisia.

Kays ChakerUrology Department, La RABTA Hospital, Tunis, Tunisia.

Houcine BouchaalaUrology Department, Habib Bourguiba Hospital, Sfax, Tunisia.

Yassine NouiraUrology Department, La RABTA Hospital, Tunis, Tunisia.

Mourad Hadj SlimenUrology Department, Habib Bourguiba Hospital, Sfax, Tunisia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Horseshoe kidney (HSK) is frequently associated with ureteropelvic junction obstruction (UPJO), but the occurrence of upper tract urothelial carcinoma (UTUC) in this setting is exceptionally rare. We report a 66-year-old man presenting with left flank pain and a giant hydronephrotic moiety of an HSK caused by longstanding UPJO. Computed tomography revealed massive hydronephrosis (50 × 46 × 28 cm) with enhancing urothelial wall thickening suspicious for UTUC. The patient underwent open heminephroureterectomy. Histopathology confirmed UTUC. This case highlights the need to suspect malignancy in chronically obstructed horseshoe kidneys and emphasizes the importance of meticulous preoperative imaging and surgical planning.

Indexed as

HeminephroureterectomyHorseshoe kidneyUpper tract urothelial carcinomaUreteropelvic junction obstruction

Identifiers

PMID42703608

DOI10.1016/j.eucr.2026.103589

PMCPMC13546821

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