We report a rare case of transitional-cell carcinoma of the bladder in an 18-year-old girl with intermittent hematuria. The tumor was diagnosed through the cystogram phase of the excretory urogram and bladder ultrasound. Transurethral resection (TUR) of the tumor was performed. As most tumors are low-grade and low-stage and are associated with an excellent prognosis, endoscopic TUR is the preferred therapeutic measure. However, recurrence as well as death have been reported in this age group. These patients should be followed carefully, similar to adult patients.