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Year : 2011  |  Volume : 27  |  Issue : 1  |  Page : 133-134

Impacted calculus within a urethral stent: A rare cause of urinary retention

Department of Urology, Christian Medical College Hospital, Ida Scudder Road, Vellore, Tamilnadu, India

Date of Web Publication29-Mar-2011

Correspondence Address:
Shanmugasundaram Rajaian
Department of Urology, Christian Medical College, Vellore, Tamilnadu- 632004, Vellore
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0970-1591.78423

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An elderly male presented to the emergency department with acute urinary retention. He had poor flow of urine associated with serosanguinous discharge per urethra for 3 days duration. Earlier he underwent permanent metallic urethral stenting for post TURP bulbar urethral stricture. Plain X-ray of Pelvis showed an impacted calculus within the urethral stent in bulbar urethra. Urethrolitholapaxy was done with semirigid ureteroscope. Urethral stent was patent and well covered. Subsequently he had an uneventful recovery. We describe a unique case of acute urinary retention due to calculus impaction within a urethral stent.

Keywords: Urethral calculus, urethral stent, endoscopic treatment

How to cite this article:
Rajaian S, Gopalakrishnan G, Kumar S, Kekre NS. Impacted calculus within a urethral stent: A rare cause of urinary retention. Indian J Urol 2011;27:133-4

How to cite this URL:
Rajaian S, Gopalakrishnan G, Kumar S, Kekre NS. Impacted calculus within a urethral stent: A rare cause of urinary retention. Indian J Urol [serial online] 2011 [cited 2022 May 26];27:133-4. Available from:

   Introduction Top

Permanent urethral stents have been used for treatment of recurrent urethral stricture in men who are unfit or refusing urethroplasty. Even though the initial results of the urethral stents were promising, long term follow-up revealed higher incidence of complications and poorer results. [1] We report a case of acute urinary retention due to stone impaction within the permanent urethral stent placed for recurrent urethral stricture.

   Case Report Top

A 67-year-old male underwent transurethral resection of prostate (TURP) four years ago for benign prostatic hyperplasia. Six months later he developed 1.5cm long 6Fr caliber proximal bulbar urethral stricture and underwent endoscopic internal urethrotomy (EIU). He had recurrence of stricture at the same site six months later. As he had multiple comorbid illnesses precluding a urethroplasty and he was not willing for the same, a 35mm Microvasive Ultraflex 42Fr permanent metallic urethral stent was placed after internal urethrotomy. He was asymptomatic for three years and later on developed voiding urinary tract symptoms associated with serosanguinous discharge per urethra for three days. He presented to the Emergency Department with acute urinary retention. An attempted urethral catheterization failed. Suprapubic cystostomy (SPC) was done and a 14Fr foley's catheter placed. Plain X-rays of the pelvis revealed a 2cm long calculus impacted within the urethral stent [Figure 1] and [Figure 2]. Urethrolithotripsy using 8.9 Fr / 13 Fr Wolf semi-rigid ureteroscope was done due to firm stone impaction. There was no obstruction intraluminally across the urethral stent and the stent was well covered. After urethral catheter removal, he voided well with good flow. Post operatively he is voiding well.
Figure 1: Anteroposterior view of plain X-ray pelvis showing impacted calculus (hollow arrow) within the Ultraflex metallic stent in bulbar urethra

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Figure 2: Right antero-oblique view of the plain X-ray pelvis showing the same findings

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   Discussion Top

Permanent self expanding metallic wall stents are often used to treat bladder outflow obstruction due to various conditions like benign prostatic enlargement, [2] detrusor-sphincter dyssynergia [3] and urethral strictures. [4] Their use in urethral stricture is limited to those who are too old or refusing urethroplasty and also advocated for treating patients in whom previous treatment has been unsuccessful. [1] Though the intial short term success rate was good, the long term success was poor and many would require secondary intervention. [5] Urethral stents are associated with complications like inappropriate placement, migration, stent encrustation, epithelial hyperplasia, intraluminal or extraluminal strictures and malignancy. [1],[6] Urethral stents are also associated with formation of stones within the stent on the exposed part. Seventeen percent of the 60 men who underwent urethral stenting had stones within the urethral stent and had endoscopic management for it. [1]

Our patient presented with acute urinary retention due to stone impaction within the urethral stent. To the best of our knowledge, such a complication has not been previously reported in English literature.

   References Top

1.Hussain M, Greenwell TJ, Shah J, Mundy A. Long-term results of a self-expanding wallstent in the treatment of urethral stricture. BJU Int 2004;94:1037-9.   Back to cited text no. 1
2.Taksin L, Vidart A, Mozer P, Conort P, Richard F, Chartier-Kastler E. Palliative treatment of symptomatic benign prostatic hyperplasia by permanent urethral stent (Ultraflex, Boston Scientific) in high surgical risk patients. Prog Urol 2007;17:954-9.   Back to cited text no. 2
3.Hamid R, Arya M, Patel HR, Shah PJ. The mesh wallstent in the treatment of detrusor external sphincter dyssynergia in men with spinal cord injury: a 12-year follow-up. BJU Int 2003;91:51-3.   Back to cited text no. 3
4.Shah DK, Paul EM, Badlani GH 11-year outcome analysis of endourethral prosthesis for the treatment of recurrent bulbar urethral stricture. J Urol 2003;170:1255-8.  Back to cited text no. 4
5.De Vocht TF, van Venrooij GE, Boon TA. Self-expanding stent insertion for urethral strictures: a 10-year follow-up.BJU Int 2003;91:627-30.   Back to cited text no. 5
6.Paddack J, Leocádio DE, Samathanam C, Nelius T, Haynes A Jr. Transitional cell carcinoma due to chronic UroLume stent irritation. Urology 2009;73:995-6.  Back to cited text no. 6


  [Figure 1], [Figure 2]

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