Nonmuscular Invasive Urothelial Carcinoma of the Bladder in Pediatric and Young Adult Patients: Age-related Outcomes

TCCB is rarely observed in the first 3 decades of life. The prognosis is good in early-age presentation. Sex distribution, pathological grading, and prognosis were found different according to age. Patients younger than 19 years behave in a more favorable manner than those older, and should be followed up like adults.