Objective: In this article, the radiologic findings in the processes of diagnosis and treatment of spontaneous urinomas, which represent an uncommon urinary system pathology, were retrospectively evaluated and explicated with published literature together.

Materials and Methods: The medical records were searched for all cases of spontaneous urinoma diagnosed between 2000-2007. When records were examined, iatrogenic and post traumatic urinomas were excluded from the study. Finally, four cases were identified as spontaneous urinomas, and all radiologic and urologic features of these cases were evaluated.

Results: All cases were male patients with ages between 35-78 (mean:50.8). The most common complain was flank pain (%100). The most common physical examination finding was costovertebral angle tenderness (%75). The initial modality utilized was utrasonographic imaging. Because urinoma formation was suspected in all patients but one with ultrasonography, all patients underwent computed tomographic imaging to make the diagnosis of urinoma. Urinomas in three cases were spontaneously resorbed in follow-up.

Conclusion: This study indicated that ultrasonograpghy is the initial method for detecting fluid collection in retroperitoneal space, contrast-enhanced computed tomography does have significant role in verifying the spontaneous urinoma diagnosis and in demonstrating diagnostic details and uncomplicated urinomas may self-resolve without any intervention.