User:Mr. Ibrahem/Posterior urethral valve1

Posterior urethral valve
Other names	Congenital obstructive posterior urethral membrane
Vesiculæ seminales and ampullæ of ductus deferentes, seen from the front. Posterior urethral valves are at the dorsal aspect (back) of the prostatic urethra.
Specialty	Urology
Symptoms	Poor feeding, failure to thrive
Complications	Chronic kidney disease, incomplete lung development, urinary incontinence, urinary tract infections
Usual onset	Present at birth
Types	Type I, II, III
Causes	Unknown
Risk factors	Family history.
Diagnostic method	Ultrasound, voiding cystourethrography
Differential diagnosis	Other causes of oligohydramnios, vesicoureteral reflux, Prune–belly syndrome, ureteric stenosis
Treatment	Urinary catheter, surgery, management of complications
Prognosis	Variable
Frequency	1 in 5,000 male births

Posterior urethral valve (PUV) is a disorder were the urethra in a newborn male is blocked by a fold of tissue. Symptoms after birth may include poor feeding or failure to thrive. It may be associated with urinary retention, chronic kidney disease, incomplete development of the lungs, urinary incontinence, or urinary tract infections.

How and why the disorder forms in unclear. Risk factors include a family history. They can be divided into three types based on the proposed origin of the fold of tissue. The potential origins of the fold; however, is disputed as of 2020. Diagnosis may occur before birth by ultrasound or after birth via voiding cystourethrography.

Surgery may be carried out before birth; however, results are mixed. After birth the bladder may be drained with a feeding tube. Other efforts may be required to address electrolyte or breathing problems. Surgery is required to remove the fold of tissue and potentially to treat any vesicoureteric reflux.

Posterior urethral valve occurs in about one in 5,000 male births. The condition was first described in 1717 by Giovanni Battista Morgagni. The classification into types occurred in 1919 by Hugh Young.