Collection kystique retro péritonéal révélant un énorme urinoma

Mrs. RF 50 years old, is a diabetic on insulin, poorly followed, complicated by optic neuropathy at the stage of preblindness, as well as peripheral arterial disease of the lower limb. She consulted for left back pain. Clinical examination found an afebrile patient with lumbar touch. The Urine dipstick is negative. The biological assessment was correct, the hydatid serology was negative. The abdominal ultrasound highlighted a huge mass fluid left retroperitoneal back the left kidney. The CT found a cystic mass of 18 cm, occupying almost all the retroperitoneum. Furthermore, the absence of urinary tract dilation allows us to discuss the following assumptions: a fornix rupture, renal cystic hygroma or duplicity. Finally retrograde pyelography of the ureter allowed settling for anurinoma because it highlighted the extravasations of contrast product. The treatment consisted of the establishment of a J stent left in place until drainage of the collection.