[Giant urinoma of the thigh].

A man aged 70 during a hospital stay over a period of a few weeks developed increasing pain and swelling of the left thigh. Despite extensive diagnostic imaging and surgical drainage, initially no diagnosis could be established. After more than 3 months the tumour proved to be caused by leakage of urine from the pelvis to the soft tissues of the leg. Unfamiliarity of the clinicians with such an extension of an urinoma contributed to the considerable diagnostic delay. Introduction of a bladder catheter stopped the flow of urine to the leg and reduced the leg circumference.