Diagnostic Accuracy of Ultrasonography versus Cystoscopy for Detection of Bladder Tumors in Patients with Microscopic Hematuria: A Cross-Sectional Study

Introduction: Microscopic hematuria is a frequent urological finding and may be the first sign of bladder tumors. Although cystoscopy is the gold standard for detecting bladder tumors, its invasiveness and cost necessitate evaluation of non-invasive alternatives. This study aimed to determine the sensitivity and specificity of ultrasonography in detecting bladder tumors in patients with microscopic hematuria who have the indications for cystoscopy.Methods: In this cross-sectional study, ۱۱۷۰ patients with microscopic hematuria were enrolled. All participants underwent both abdominal ultrasonography and cystoscopy. Data were analyzed using SPSS version ۲۴, and sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and area under the ROC curve (AUC) were calculated.Results: The mean age of patients was ۵۹.۹ years; ۷۳.۳% were male. Ultrasonography demonstrated a sensitivity of ۱۰۰%, specificity of ۹۹.۲%, PPV of ۷۵%, and NPV of ۱۰۰% for detecting bladder masses. ROC analysis revealed excellent discriminative ability (AUC ≈۱.۰). Conclusions: Based on these findings, ultrasonography may serve as a first‑line triage modality in selected low‑risk patients with asymptomatic microscopic hematuria when performed by experienced radiologists, potentially reducing—but not replacing—the need for immediate cystoscopy.

کلیدواژه ها:

Ultrasonography ، cystoscopy ، bladder tumor ، Microscopic hematuria ، Screening