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It is often difficult to obtain a catheterized urine specimen from patients with a history of posterior urethral valves dim to the residual dilated prostatic urethra.
The presenting symptoms of posterior urethral valves depend on the age of the patient.
VOIDING CYSTOURETHROGRAM (VCUG):It is the best imaging technique for the diagnosis of posterior urethral valves.
In patients diagnosed with bilateral hydronephrosis, a VCUG should be performed during the first postnatal week (15) because these individuals have a higher risk of abnormalities, such as posterior urethral valves, prune belly syndrome, and urethral atresia, which are diseases with high risk of impairing renal function, especially when the diagnosis is delayed.
The vesicoureteral reflux dysplasia syndrome in patients with posterior urethral valves.
Posterior urethral valves is a structural abnormality in boys in which a membrane blocks the flow of urine out of the bladder.
When their origin is congenital, it is essentially due to posterior urethral valves or meatal stenosis.
UF was done for the following clinical entities: VD in 215 (41%), post-hypospadias repair in 136 (26%), meatal stenosis (MS) in 21 (4%), nocturnal enuresis in 42 (8%), posterior urethral valves (PUV) in 26 (5%) and vesicourethral reflux (VUR) in 84 (16%) (Fig.
If ultrasound findings show a distended bladder with or without a distended posterior urethra, the most likely diagnosis is posterior urethral valves.
Many patients with medical conditions that require CIC (for example, prune belly syndrome, posterior urethral valves, multiple sclerosis, atonic bladder, and urethral stricture) have urethral sensation and complain of discomfort when catheterizing.

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