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Acute obstructive pyelonephritis revealing a crossed non-fused renal ectopia in the early postpartum period: A case

Younes Houry1, Younes Zemrag1, Hamza Rais1

  • 1Department of Urology, Mohammed VI University of Sciences and Health - UM6SS, Casablanca, Morocco.

Urology Case Reports
|December 1, 2025
PubMed

Non-fused crossed renal ectopia (CRE) is a rare congenital anomaly where one kidney migrates contralaterally without fusion. We report a 31-year-old woman presenting nine days postpartum with febrile abdominal pain revealing a left non-fused crossed ectopic kidney complicated by bilateral ureterohydronephrosis and acute pyelonephritis. Management involved bilateral ureteral stenting and antibiotic therapy with favorable recovery. This case highlights the potential for pregnancy-related physiological changes to unmask previously silent renal anomalies and underscores the diagnostic importance of comprehensive maternal imaging in postpartum febrile syndromes.

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