[Giant renal cyst as cause of colic obstruction].

A 97-year old woman presented with a 2-months history of asthenia, loss of appetite, nauseas and intermittent diarrhea. She presented an important colic distension associated to an inflammatory syndrome. Microbiological documentation (blood, urine, saddles stool) was negative. Abdominal computed tomography (CT) showed a 15 cm of diameter (giant) right cortical renal cyst with colic obstruction by external colic compression. A percutaneous cyst drainage was performed allowing the evacuation of 1,500 cc. The fluid culture was positive for Raoultella ornithinolytica and Enterococcus faecalis. No antibiotics were given but inflammatory syndrome remained within normal value. Colic function remained normal.