title: Neoplasms of transitional cell origin in first twenty years of life.
mesh_terms: D000293:Adolescent; D002295:Carcinoma, Transitional Cell / Q000453:epidemiology*; D002648:Child; D006801:Humans; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000453:epidemiology; D014481:United States; D001749:Urinary Bladder Neoplasms / Q000453:epidemiology*