Pediatric malignant tumors in the urinary bladder are rare with a high prevalence of rhabdomyosarcomas. A 15-month-old patient was referred to the authors' center because of a urinary bladder tumor. Imaging studies disclosed a solid pelvic mass in the dome of the bladder confirmed by a cystoscopy. Surprisingly, the biopsy done during this procedure confirmed a neuroblastoma with a favorable Shimada classification. This tumor had no bad prognostic factors. But, vessel compression and local infiltration led to delayed surgery, and neoadjuvant chemotherapy was initiated. After chemotherapy, a complete surgical resection was accomplished. Currently, this patient is in complete continuous remission. Only 5 other cases have been reported. Thus, urinary neuroblastoma seems to be a very rare pediatric tumor, but it should be considered in the differential diagnoses of urinary bladder tumor.
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