High-grade transitional cell carcinoma of the bladder in a 5-year-old boy successfully treated with partial cystectomy and intravesical bacillus Calmette-Guerin.

Pediatric transitional cell carcinomas of the bladder are typically characterized by low-grade histology, adolescent and young adult age, and cure with surgical resection. Here, we report a high-grade transitional cell carcinoma of the bladder in a 5-year-old boy treated with a partial cystectomy and adjuvant intravesical Bacillus Calmette-Guerin.