Samer Husseın Hadı Alhaddad*, Hikmet Enes Canpolat, Ozgur kazan, Mehmet Çağlar Çakıcı and Asıf Yıldırım

Istanbul Medeniyet University Goztepe Education and Research Hospital, Istanbul, Turkiye

*Corresponding Author: Samer Husseın Hadı Alhaddad, Istanbul Medeniyet University Goztepe Education and Research Hospital, Istanbul, Turkiye.

Received: September 02, 2026; Published: October 05, 2026

Trimodal therapy (TMT) is an established bladder-preserving approach for selected patients with muscle-invasive bladder cancer (MIBC). However, long-term complications related to radiation, repeated instrumentation, and urinary diversion devices may occur. We report a 75-year-old male patient diagnosed with T2 high-grade urothelial carcinoma in April 2022. The patient declined radical cystectomy and underwent bladder-preserving treatment with gemcitabine-based chemotherapy and radiotherapy. During follow-up, he developed a distal ureteral stricture requiring long-term double-J (DJ) stenting and multiple endoscopic interventions. In May 2026, the patient presented with generalized weakness. Following urethral catheterization, fecal material was observed draining through the catheter. Computed tomography revealed migration of the distal end of the left DJ stent into the colon, consistent with a colovesical fistula. Additionally, new-onset right-sided grade 2 and left-sided grade 3 hydronephrosis were detected. The patient underwent urgent bilateral percutaneous nephrostomy placement for urinary diversion, and the migrated DJ stent was removed. This case highlights a rare but serious late complication of bladder-preserving therapy, emphasizing the combined impact of radiation-induced tissue changes and chronic ureteral stenting. Clinicians should maintain a high index of suspicion for fistula formation in patients presenting with atypical urinary findings after long-term instrumentation.

Keywords: Trimodal Therapy; Muscle-İnvasive Bladder Cancer; Double-J Stent; Colovesical Fistula; Radiation Complication; Nephrostomy

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Citation

Citation: Samer Husseın Hadı Alhaddad., et al. “A Rare Late Complication of Bladder-Preserving Therapy: Colonic Migration of a Double-J Stent with Enterovesical Fistula Formation". Acta Scientific Medical Sciences 10.10 (2026): 35-38.

Copyright

Copyright: © 2026 Samer Husseın Hadı Alhaddad., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.