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Updated: Jul 12, 2026

An Orthotopic Bladder Cancer Model for Gene Delivery Studies
Published on: December 1, 2013
Renal Granuloma Distinct From the Renal Pelvis Following Bacillus Calmette-Guérin Treatment for Bladder Cancer: A
Ryuji Oka1, Yusuke Goto1,2, Kosuke Mikami1
1Department of Urology Teikyo University Chiba Medical Center Chiba Japan.
Introduction:
The incidence of renal complication following BCG treatment is rare. Few previous studies have reported a solitary renal granuloma distinct from the renal pelvis following BCG treatment.
Case Presentation:
An 85-year-old male underwent transurethral resection of the bladder tumor. A 6-week induction of intravesical BCG instillation therapy was planned; however, the sixth instillation was canceled owing to fever. Regular follow-up revealed no recurrence. However, 4 years later, CT revealed a right renal mass. With a clinical diagnosis of renal cell carcinoma, robot-assisted partial nephrectomy was performed. The pathological diagnosis was epithelioid cell granuloma with caseating necrosis. Stress cystography revealed no vesicoureteral reflux.
Conclusion:
A renal granuloma caused by BCG is one of the differential diagnoses for solitary renal mass following BCG treatment, even if the mass is not adjacent to the renal pelvis.
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