Congenital urethral obstruction: Cobb's collar or prolapsed congenital obstructive posterior urethral membrane (COPUM)

Dewan, P. A.; Keenan, R. J.; Morris, Lloyd; Quesne, Gilles

doi:10.1111/j.1464-410x.1994.tb07463.x

Cited by 51 publications

(25 citation statements)

References 15 publications

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“…The functional differential diagnosis upon history and physical examination is urethral web, urethral duplication, anterior urethral valve, anterior urethral diverticulum, congenital narrowing of bulbar urethra -Cobb's collar, urethral stricture, hydrocele (12), megalourethra, periurethral abscess, perianal abscess, congenital urethral folds, prolapsed posterior urethral valve, urethral tumors, urethral stones (13)(14)(15)(16)(17)(18)(19). …”

Section: Clinical Manifestation and Classification Of Syringocelesmentioning

confidence: 99%

Current diagnosis and management of syringocele: a review

Melquist¹,

Sharma²,

Sciullo³

et al. 2010

Int. braz j urol.

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Cowper's syringocele is a rare but an under-diagnosed cystic dilation of the Cowper's ducts and is increasingly being recognized in the adult population. Recent literature suggests that syringoceles be classified based on the configuration of the duct's orifice to the urethra, either open or closed, as this also allows the clinical presentations of 2 syringoceles to be divided, albeit with some overlap. Usually post-void dribbling, hematuria, or urethral discharge indicate open syringocele, while obstructive symptoms are associated with closed syringoceles. As these symptoms are shared by many serious conditions, a working differential diagnosis is critical. Ultrasonography coupled with retro and ante grade urethrography usually suffices to diagnose syringocele, but supplementary procedures -such as cystourethroscopy, computed tomography scan, and magnetic resonance imaging -can prove useful. Conservative observation is first recommended, but persistent symptoms are usually treated with endoscopic marsupialization unless contraindicated. Upon reviewing the literature, this paper addresses the clinical anatomy, classification, presentation, diagnosis, and treatment of syringoceles in further detail.

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Section: Clinical Manifestation and Classification Of Syringocelesmentioning

confidence: 99%

Current diagnosis and management of syringocele: a review

Melquist¹,

Sharma²,

Sciullo³

et al. 2010

Int. braz j urol.

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“…Congenital urethral strictures at the level of the posterior urethra have been classified as posterior urethral valves (three types) in classical Young's classification and COPUM (congenital obstructing posterior urethral membrane) first described by Dewan et al 3 4 The strictures of the bulbar urethra have been underestimated for many years until the first half of the 1990s when Dewan defined and classified these anomalies as congenital. Recently, Dewan et al redefined and classified the bulbar urethral narrowing by reviewing video-recorded cystoscopies as well as radiological pictures of their patients.…”

Section: Discussionmentioning

confidence: 99%

Cobb's collar: a rare cause of urinary retention

2013

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Cobb's collar is a membranous stricture of the bulbar urethra, often misdiagnosed, potentially leading to acute urinary retention, upper urinary tract dilations, enuresis, infectious diseases, poor streaming and haematuria. A 14-year-old boy with a history of previous hospitalisations came to our attention. A Cobb's collar was diagnosed and successfully managed with a videoendoscopic one-step approach. Although extremely uncommon, paediatric urologists must be aware of this congenital anomaly. A correct and timely diagnosis and endoscopic management may affect positively the clinical onset of these patients avoiding major urethral surgery and preserving renal and bladder function.

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“…Stephens concluded that they were the result of abnormal integration of the wolffian ducts into the urethra. Dewan et al (1994) created the term COPUM (congenital obstructing posterior urethral membrane) in the 1990s to challenge the traditional nomenclature of posterior urethral valves. Dewan's term more accurately reflected the theory that the obstruction was secondary to a single membrane in the posterior urethra.…”

Section: Etiologymentioning

confidence: 99%