[A Case Report of Granulomatous Renal Masses Following Intravesical Instillation of Bacillus Calmette-Guérin Therapy].

Transurethral resection of bladder tumor (TURBT) was performed on the bladder tumor of a 68-yearold male patient. Bacillus Calmette-Guérin (BCG) intravesical therapy was performed to prevent recurrence (Immunobladder : ○R 80 mg once/week×6 times). A 40 mm tumor was noted in the left kidney by renal ultrasound performed two months after the completion of BCGintravesical therapy. Computed tomography (CT) showed non-enhanced multiple mass lesions in the left kidney. Renal tuberculous granuloma, hypovascular renal cell carcinoma or malignant lymphoma was suspected and CT-guided needle biopsy was performed. The patient was diagnosed with renal tuberculous granuloma that developed after BCGintravesical therapy as epithelioid cell granulomas were noted in the biopsy results. Treatment with anti-tuberculosis drugs was started and the tumor showed signs of shrinkage.