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Case Reports
. 2014 Jan;24(1):87-90.
doi: 10.4103/0971-3026.130714.

Cobb's collar occurring in two brothers in a family: A rare entity revisited

Partha Pal  1 , Sayantan Ray  1 , Arunansu Talukdar  2 , Nikhil Sonthalia  2 , Sumit Chakraborty  3
Affiliations
Case Reports

Cobb's collar occurring in two brothers in a family: A rare entity revisited

Partha Pal et al. Indian J Radiol Imaging. 2014 Jan.

Abstract

Most urethral strictures arise from iatrogenic, traumatic, or inflammatory causes. We report the familial occurrence of a congenital bulbar urethral stricture in two brothers. Retrograde and voiding cystourethrography was performed. A Cobb's collar was diagnosed after radiological and endoscopic evaluation in both cases and was successfully managed with urethroplasty. Cobb's collar is a rarely recognized cause of a membranous stricture of bulbar urethra that can lead to several urinary problems. In cases of adolescent and young adults presenting with symptoms of progressive urinary obstruction and enuresis with or without urinary tract infection, Cobb's collar can be seen as a minor constriction in the bulbar urethra, but is not frequently symptomatic, and the familial occurrence of such a stricture is even rarer.

Keywords: Bulbar urethra; Cobb's collar; congenital strictures; cystourethrography; urethroplasty.

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Conflict of interest statement

Conflict of Interest: None declared.

Figures

Figure 1(A, B)
Figure 1(A, B)
(A) Bilateral mild hydronephrosis (B) significant post-void urine residue (Case 1)
Figure 2(A, B)
Figure 2(A, B)
(A) Retrograde urethrogram demonstrating a narrowing in the proximal bulbar urethra, (B) micturating cystourethrogram (MCU) showed a narrowing in the proximal bulbar urethra (white ring) (Case 1)
Figure 3
Figure 3
Retrograde urethrogram showing bulbar urethral stricture (Case 2)
Figure 4
Figure 4
Sagittal section through prostate and urethra showing the area of Cobb's collar. It can appear either as a ridge of tissue (Cobb's collar I) or as a definite stricture in the area described (Cobb's collar II) or even as a very tight pinhole opening (Cobb's collar III). P, prostate; S, external sphincter; C, Cobb's collar
See this image and copyright information in PMC

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