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CC BY-NC-ND 4.0 · Indian J Radiol Imaging 2014; 24(01): 87-90
DOI: 10.4103/0971-3026.130714
Abdominal Radiology

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

Partha Pal
Department of Medicine, Calcutta National Medical College and Hospital, Kolkata, West Bengal, India
,
Sayantan Ray
Department of Medicine, Calcutta National Medical College and Hospital, Kolkata, West Bengal, India
,
Arunansu Talukdar
Department of Medicine, Medical College and Hospital, Kolkata, West Bengal, India
,
Nikhil Sonthalia
Department of Medicine, Medical College and Hospital, Kolkata, West Bengal, India
,
Sumit Chakraborty
Department of Radiology, Institute of Post Graduate Medical Education and Research and Seth Sukhlal Karnani Memorial Hospital, Kolkata, West Bengal, India
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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


Publication History

Article published online:
02 August 2021

© 2014. Indian Radiological Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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  • References

  • 1 Cobb BG, Wolf JA Jr, Ansell JS. Congenital stricture of the proximal urethral bulb. J Urol 1968;99:629-31.
  • 2 Moormann JG. Congenital bulbar urethral stenosis as a cause of diseases of the urogenital junction. Urologe A 1972;11:157-60.
  • 3 Sadler TW. Urogenital System in Langman′s Medical Embryology. 11 th ed. Philadelphia, PA: Walters Kluwer/Lippincott Williams and Wilkins; 2010. p. 235-40.
  • 4 Manzoni C, Valentini AL. Posterior urethral valves. Rays 2002;27:131-4.
  • 5 Cranston D, Davies AH, Smith JC. Cobb′s collar--a forgotten entity. Br J Urol 1990;66:294-6.
  • 6 Dewan PA, Pillay S, Kaye K. Correlation of the endoscopic and radiological anatomy of congenital obstruction of the posterior urethra and the external sphincter. Br J Urol 1997;79:790-6.
  • 7 Nonomura K, Kanno T, Kakizaki H, Koyama T, Yamashita T, Koyanagi T. Impact of congenital narrowing of the bulbar urethra (Cobb′s collar) and its transurethral incision in children. Eur Urol 1999;36:144-8; discussion 149.
  • 8 Parkkulainen KV. Posterior urethral obstruction: Valvular or diaphragmatic? Endoscopic diagnosis and treatment. Birth Defects Orig Artic Ser 1977;13:63-74.
  • 9 Dewan PA, Keenan RJ, Morris LL, Le Quesne GW. Congenital urethral obstruction: Cobb′s collar or prolapsed congenital obstructive posterior urethral membrane (COPUM). Br J Urol 1994;73:91-5.
  • 10 Banks FC, Griffin SJ, Steinbrecher HA, Malone PS. Aetiology and treatment of symptomatic idiopathic urethral strictures in children. J Pediatr Urol 2009;5:215-8.
  • 11 Adorisio O, Bassani F, Silveri M. Cobb′s collar: A rare cause of urinary retention. BMJ Case Rep 2013 Jan 22;2013. pii: bcr2012008137. doi: 10.1136/bcr-2012-008137.
  • 12 Dewan PA, Goh DG. Variable expression of the congenital obstructive posterior urethral membrane. Urology 1995;45:507-9.
  • 13 Aragona F, Maio G, Oliva G, Calabrò A, Ostardo E, Artibani W. Familial occurrence of congenital stricture of bulbar urethra. Urol Int 1991;46:112-3.