Congenital obstructive posterior urethral membrane

Membranous obstruction is more likely than the valvular mechanism that gave its name to the malformation (Dewan and Goh 1995). This concept is referred to as congenital obstructive posterior urethral membrane (COPUM). As a matter of fact, most children seem to present with the same membranous abnormality more or less modified by the passage of indwelling catheters or a Whitaker diathermy hook (Whitaker and Sherwood 1986). 

Cobb BG, Wolf JA, Ansell JS (1968) Congenital stricture of the proximal urethral bulb. J Urol 99 629-631 Dewan PA, Zappala SM, Ransley PG et al (1992) Endoscopic reappraisal of the morphology of congenital obstruction of the posterior urethra. Br J Urol 70 439-444 Dewan PA, Keenan RJ, Morris LL et al (1994) Congenital urethral obstruction Cobb s collar or prolapsed congenital obstructive posterior urethral membrane (COPUM). Br J Urol 73 91-95... 

Dewan PA, Goh DG (1995) Variable expression of the congenital obstructive posterior urethral membrane. Urology 45 507-509... 

Careful attention must always be given to precise assessment of the urethral morphology in order to detect narrowing of the bulbar urethra (Cobb s collar) (Dewan et al. 1995 Nonomura et al. 1999) and congenital obstructing posterior urethral membranes (COPUM) (Dewan 1993 Dewan et al. 1997). 

Dewan PA (1993) Congenital obstructing posterior urethral membranes (COPUM) further evidence for a common morphological diagnosis. Pediatr Surg Int 8 45-50... 

---