<prompt> Painless gross hematuria occurs in ?Renal cell carcinomaPolycystic kidneyStricture of urethraWilms tumor  <response>: Ans. is a i.e., Renal cell carcinoma Hematuria without other symptoms silent hematuria must be regarded as a symptom of tumor of the bladder or kidney until proved otherwise. - Smiths Urology Among the given causes Renal Cell Carcinoma Wilms tumor, both can cause gross, painless hematuria. RCC being a much more common cause is the option of choice. 