7 days after tumor enucleation of the right kidney, the patient experienced decreasing renal function, rising inflammatory parameters.
A multiphase CT scan was performed. After a 20 min delayed phase, it was not clear if the fluid in the right pararenal space was a urinoma. Only after 90 min, increased attenuation of the perirenal fluid (and extravasation) can be detected.
The dislocated nephroureteral catheter may have led to increased pressure in the upper collecting system, contributing to the formation of the urinoma.