|Urethral meatal stenosis|
|Classification and external resources|
|Patient UK||Meatal stenosis|
Urethral meatal stenosis or urethral stricture is a narrowing (stenosis) of the opening of the urethra at the external meatus //, thus constricting the opening through which urine leaves the body from the urinary bladder.
Causes, incidence, and risk factors
|This section needs more medical references for verification or relies too heavily on primary sources. (February 2013)|
Studies have indicated that male circumcision contributes to the development of urethral stricture. Among circumcised males, reported incidence figures include 0%, 0.01%, 0.55%, 0.9%, 2.8%, 7.29%, 9-10%, and 11%. In Van Howe's study, all cases of meatal stenosis were among circumcised boys. When the meatus is not covered by the foreskin, it can rub against urine soaked diapers resulting in inflammation and mechanical trauma. Meatal stenosis may also be caused by ischemia resulting from damage to the frenular artery during circumcision.
- Abnormal strength and direction of urinary stream
- Visible narrow opening at the meatus in boys
- Irritation, scarring or swelling of the meatus in boys
- Discomfort with urination (dysuria and frequency)
- Incontinence (day or night)
- Bleeding (hematuria) at end of urination
- Urinary tract infections - increased susceptibility due to stricture
Signs and tests
In females, meatal stenosis can usually be treated in the physician's office using local anesthesia to numb the area and dilating (widening) the urethral opening with special instruments.
In boys, it is treated by a second surgical procedure called meatotomy in which the meatus is crushed for 60 seconds with a straight mosquito hemostat and then divided with fine-tipped scissors. Recently, home-dilation has been shown to be a successful treatment for most boys.
Most people can expect normal urination after treatment.
Meir and Livne suggest that use of a broad spectrum antibiotic after hypospadias repair will "probably reduce meatal stenosis [rates]", while Jayanthi recommends the use of a modified Snodgrass hypospadias repair. Viville states that "prevention is based essentially upon more caution in the use of indwelling urethral catheters."
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- Van Howe, R.S. (2006). "Incidence of meatal stenosis following neonatal circumcision in a primary care setting". Clin Pediatr (Phila) 45 (1): 49–54. PMID 16429216. doi:10.1177/000992280604500108.
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- Meir, D.B.; P.M. Livne (June 2004). "Is prophylactic antimicrobial treatment necessary after hypospadias repair?". The Journal of Urology 171 (6 part 2): 2621–2622. PMID 15118434. doi:10.1097/01.ju.0000124007.55430.d3.
- Jayanthi, V.R. (October 2003). "The modified Snodgrass hypospadias repair: reducing the risk of fistula and meatal stenosis". The Journal of Urology 170 (4 part 2): 1603–1605; discussion 1605. PMID 14501672. doi:10.1097/01.ju.0000085260.52825.73.
- Viville, C.; J. Weltzer (1981). "[Iatrogenic stenosis of the male urethra. 50 cases (author's transl)]". Journal d'urologie (in français) 87 (7): 413–418. PMID 7310161.