Introduction. A urinoma is a localized urine collection in the
retroperitoneum, occurring outside the urinary tract. Although relatively
rare, traumatic urinomas in pediatric patients pose significant diagnostic
and therapeutic challenges. Initial diagnosis primarily relies on
ultrasonography, but computed tomography (CT) and magnetic resonance imaging
(MRI) provide clearer differentiation and localization. The treatment
strategy focuses on preventing potential complications and promoting urinary
tract recovery. Case Report. We present the case of a seventeen-year-old
male with a penetrating abdominal injury. Prompt abdominal exploration
revealed and managed minor colon and spleen lacerations. Upon readmission
due to the fever and abdominal pain, further diagnostics initially
misinterpreted the formed traumatic urinoma as a pancreatic pseudocyst.
Postoperative computed tomography, cystoscopy, and retrograde pyelography
subsequently confirmed the existence of a urinoma. Conclusion. Through this
case report and its atypical manifestation, we aim to highlight the
importance of differential diagnosis, the complexity of abdominal injuries,
and diagnostic and treatment protocols in pediatric populations. Emphasizing
a multidisciplinary strategy is crucial to optimizing treatment outcomes.