Magnetic Resonance Urethrography to Assess Obliterative Posterior Urethral Stricture: Comparison to Conventional Retrograde Urethrography With Voiding Cystourethrography

Oh, Mi Mi; Jin, Myeong Heon; Sung, Deuk Jae; Yoon, Dae Wui; Kim, Je Jong; Moon, Du Geon

doi:10.1016/j.juro.2009.10.016

Cited by 41 publications

(27 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Sonourethrography has been used to examine the lower urinary tract, but is not widely applied because of its small field of vision and a lack of recognition among urologists (4). MRI is also used to investigate pathological conditions of the lower urinary tract, but the inspection process is relatively complex (5,15,16), and it is not suitable for use in subjects with a metal implant in the pelvic area.…”

Section: Discussionmentioning

confidence: 99%

640-slice DVCT multi-dimensionally and dynamically presents changes in bladder volume and urine flow rate

Fang

Mao

et al. 2017

Exp Ther Med

View full text Add to dashboard Cite

Abstract. The present study aimed to explore the application of 640-slice dynamic volume computed tomography (DVCT) to excretory cystography and urethrography. A total of 70 healthy subjects were included in the study. Excretory cystography and urethrography using 640-slice DVCT was conducted to continuously record the motions of the bladder and the proximal female and male urethra. The patients' voiding process was divided into early, early to middle, middle, middle to late, and late voiding phases. The subjects were analyzed using DVCT and conventional CT. The cross-sectional areas of various sections of the male and female urethra were evaluated, and the average urine flow rate was calculated. The 640-slice DVCT technique was used to dynamically observe the urine flow rate and changes in bladder volume at all voiding phases. The urine volume detected by 640-slice DVCT exhibited no significant difference compared with the actual volume, and no significant difference compared with that determined using conventional CT. Furthermore, no significant difference in the volume of the bladder at each phase of the voiding process was detected between 640-slice DVCT and conventional CT. The results indicate that 640-slice DVCT can accurately evaluate the status of the male posterior urethra and female urethra. In conclusion, 640-slice DVCT is able to multi-dimensionally and dynamically present changes in bladder volume and urine flow rate, and could obtain similar results to conventional CT in detecting urine volume, as well as the status of the male posterior urethra and female urethra.

show abstract

Section: Discussionmentioning

confidence: 99%

640-slice DVCT multi-dimensionally and dynamically presents changes in bladder volume and urine flow rate

Fang

Mao

et al. 2017

Exp Ther Med

View full text Add to dashboard Cite

show abstract

“…Therefore, other factors (e.g., severity of spongiofibrosis and individual reactivity) that were not in the scope of this study might be useful for predicting treatment outcomes. Spongiofibrosis, according to several promising exploratory studies and believed to significantly limit success of internal urethrotomy in patients with stricture disease, could be detected pre-operatively by means of magnetic resonance imaging or ultrasound investigation and can therefore be considered with other clinical variables, given that specificity and sensitivity of the diagnostic modality could reach acceptable levels 16– 18 .…”

Section: Discussionmentioning

confidence: 99%

Development of a clinical algorithm for treating urethral strictures based on a large retrospective single-center cohort

et al. 2017

View full text Add to dashboard Cite

Aim: To analyze clinical data from male patients treated with urethrotomy and to develop a clinical decision algorithm. Materials and methods: Two large cohorts of male patients with urethral strictures were included in this retrospective study, historical (1985-1995, n=491) and modern cohorts (1996-2006, n=470). All patients were treated with repeated internal urethrotomies (up to 9 sessions). Clinical outcomes were analyzed and systemized as a clinical decision algorithm. Results: The overall recurrence rates after the first urethrotomy were 32.4% and 23% in the historical and modern cohorts, respectively. In many patients, the second procedure was also effective with the third procedure also feasible in selected patients. The strictures with a length ≤ 2 cm should be treated according to the initial length. In patients with strictures ≤ 1 cm, the second session could be recommended in all patients, but not with penile strictures, strictures related to transurethral operations or for patients who were 31-50 years of age. The third session could be effective in selected cases of idiopathic bulbar strictures. For strictures with a length of 1-2 cm, a second operation is possible for the solitary low-grade bulbar strictures, given that the age is > 50 years and the etiology is not post-transurethral resection of the prostate. For penile strictures that are 1-2 cm, urethrotomy could be attempted in solitary but not in high-grade strictures. Conclusions: We present data on the treatment of urethral strictures with urethrotomy from a single center. Based on the analysis, a clinical decision algorithm was suggested, which could be a reliable basis for everyday clinical practice.

show abstract

“…The surgical procedure had previously been determined by findings on conventional RGU. It was useful for selecting the most appropriate surgical procedure (20).…”

Section: Discussionmentioning

confidence: 99%

Magnetic resonance urethrography versus conventional retrograde urethrography in the evaluation of urethral stricture: Comparison with surgical findings

El-Bab

Galal

Abdelhamid

et al. 2015

The Egyptian Journal of Radiology and Nuclear Medicine

View full text Add to dashboard Cite

Back ground: Urethral stricture means fibrous scarring of the urethra caused by collagen and fibroblast proliferation. Magnetic resonance urethrography was emerging as a new modality for imaging the male urethra. Objectives: To evaluate the accuracy of MR urethrography in comparison to the conventional retrograde urethrography (RUG) in the evaluation of urethral stricture in comparison with surgical findings. Design, setting and participants: This prospective study was done in the period from January 2010 to March 2012 including 20 male patients with initial diagnosis of anterior urethral stricture (diagnosed by RUG). Both newly diagnosed and recurrent cases were included regardless of the etiology of stricture. The mean age was 49.6 ± 16.4 years (ranged from 19 to 70). All patients were evaluated by conventional retrograde urethrography (RUG) and magnetic resonance urethrography (MR urethrography). Outcome measurements and statistical analysis: Magnetic resonance urethrography images were analyzed, focusing on the signal intensity, location and length of the stricture. Additionally, MR findings were evaluated regarding the urethra proximal to the stricture, the corpora spongiosa surrounding the stricture, adjacent organ injuries, and the associated complications. Data obtained were compared with operative findings in all patients. Results and limitations: The mean stricture length as measured by MR urethrography and RGU was 1.32 ± 0.85 and 1.75 ± 1.02 respectively with a significant difference (p < 0.001). The mean intra-operative stricture length was 1.29 ± 0.83. MR urethrography was accurate in 19 patients (95%) while RUG was accurate in 15 patients (75%). This study has some limitations, firstly, a small number of patients are involved in this study, secondly, a 1 T magnet is used and finally, interobserver agreement was not obtained. Conclusion: MR urethrography has a higher diagnostic accuracy in the detection of urethral stricture length than conventional RUG, that is crucial for proper selection of treatment modality.

show abstract

Magnetic Resonance Urethrography to Assess Obliterative Posterior Urethral Stricture: Comparison to Conventional Retrograde Urethrography With Voiding Cystourethrography

Abstract: Magnetic resonance urethrography is more effective for evaluating obliterative posterior urethral stricture than retrograde urethrography combined with voiding cystourethrography.

Cited by 41 publications

References 11 publications

640-slice DVCT multi-dimensionally and dynamically presents changes in bladder volume and urine flow rate

640-slice DVCT multi-dimensionally and dynamically presents changes in bladder volume and urine flow rate

Development of a clinical algorithm for treating urethral strictures based on a large retrospective single-center cohort

Magnetic resonance urethrography versus conventional retrograde urethrography in the evaluation of urethral stricture: Comparison with surgical findings

Contact Info

Product

Resources

About