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What are retrograde urethrogram and micturating cystogram tests?

Tuesday, 09 December 2008
Answered by: Dr. Rajesh Ahlawat
Director, Urology and Renal Transplantation
Fortis Hospitals
New Delhi
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Q. I am a 43 years old man facing the problem of poor urine flow. The doctor has recommended me to go for these tests - retrograde urethrogram (RUG) and micturating cystogram (MCU), cystoscopy and urodynamics. Is it necessary to get all these tests done? What is RUG and MCU?

A.  All these tests are sequential and after confirmation of a diagnosis the next test may be unnecessary. RGU and MCU refer to retrograde urethrogram and micturating cystogram, radiological tests to delineate urethral narrowings and bladder shape abnormalities by injecting a dye through urethra. If these are normal, the next logical test is Urodynamic evaluation to detect functional abnormalities. Cystoscopy, as the most invasive test, is usually reserved as the last investigation.

A.  All these tests are sequential and after confirmation of a diagnosis the next test may be unnecessary. RGU and MCU refer to retrograde urethrogram and micturating cystogram, radiological tests to delineate urethral narrowings and bladder shape abnormalities by injecting a dye through urethra. If these are normal, the next logical test is Urodynamic evaluation to detect functional abnormalities. Cystoscopy, as the most invasive test, is usually reserved as the last investigation.

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