<prompt> All of the following are true about Ca bladder, exceptPainless hematuria is seenTransitional cell Ca is commonestMore in malesNone of the above  <response>: The urinary bladder is the most common site of urinary tract tumors. Most bladder tumors occur in older patients median age 65 years. Three times common in males than females. Most tumors are microscopically classified as urothelial transitional cell neoplasms. Most are malignant. Sudden painless hematuria is the presentation. Ceain dyes, smoking, Schistosomiasis, drugs like cyclophosphamide and analgesics, and radiation therapy can predispose to this condition. 