<prompt> Most impoant investigation for posterior urethral valve: March 2011UrethroscopyIVPRetrograde cystogramMicturating cystogram MCU  <response>: Ans. D: Micturating cystogram MCU Micturating cystography is mainly done to assess urethra for any outflow obstruction and stress incontinence Also done to demonstrate vesico-ureteric reflux especially in children Radiological signs of urinary tract: Bilateral spider leg pattern: Polycystic kidney Thimble bladder: Chronic TB Golf hole ureter: Tb urinary bladder Rim sign: Hydronephrosis Adder head cobra head appearance: Ureterocoele 