Diagnostic yields of sonourethrography and retrograde urethrography in adult males with anterior urethral strictures disease  A prospective comparative study: Original Article

MOSHOOD DUROJAIYE; Moses Adebisi Ogunjimi; Rufus Wale Ojewola; Rasheed Arogundade

doi:10.69885/pju.v2i02.69

Authors

Durojaiye Moshood Seun Lagos University Teaching Hospital
Moses Adebisi Ogunjimi College of Medicine, University of Lagos, & Lagos University Teaching Hospital
Rufus Wale Ojewola Lagos University Teaching Hospital & University of Lagos
Rasheed Ajani Arogundade

DOI:

https://doi.org/10.69885/pju.v2i02.69

Abstract

Background: Retrograde urethrography (RUG) has been widely accepted by most clinicians as the gold standard imaging modality for diagnosing anterior urethral strictures(US). Sonourethrography (SUG) is an attractive alternative without the risk of radiation associated with RUG that is not being routinely utilized in our environment. We prospectively compared the effectiveness of SUG and RUG in diagnosing anterior urethral strictures.

Study Design: A Prospective Comparative Study.

Place and duration of study . Department of Urology Lagos University Teaching Hospital from jan 2023 to jan 2024

METHODS: We evaluated 60 patients clinically diagnosed with anterior US using the two imaging modalities at a referral hospital. The patients included in the study had both SUG and RUG done. The sensitivity, specificity, positive predictive value, and negative predictive values in diagnosing and evaluating various parameters of anterior urethral stricture were calculated for SUG against RUG as the gold standard. The percentage of patients detected to have spongiofibrosis on SUG was also computed.

RESULT: Sixty patients received examination with a mean age of 49.95 years between the ages of 23-84. SUG proved to produce higher diagnostic results than RUG by identifying stricture sites with 97.4% sensitivity and 94.3% specificity along with accurate stricture length assessment (sensitivity 97.4%, specificity 96.2%) and mucosal detection abilities (sensitivity 86.5%, specificity 63.3%) and evaluation of lumen narrowing (sensitivity 77.8%, specificity 86.7%). Through SUG examiners properly characterized the spongiofibrosis severity across the entire patient cohort.

CONCLUSION:SUG showed comparable diagnostic accuracy to RUG in diagnosing and characterizing anterior urethral stricture disease. Additionally, sonourethrography is also advantageous over RUG in assessing periurethral fibrosis.

Keywords: Urethral stricture, imaging, sonourethrography, urethrogram, spongiofibrosis