[Infected abdominal aneurysm with retroperitoneal fibrosis--a case successfully treated conservatively]

53 year old men suffered from abdominal pain, vomiting, lack of appetite, loss of weight, with ESR > 100 mm Hg and moderate anaemia was presented. Many diagnostic procedures were without results and finally laparotomy was taken. The microscopic examination of specimen of periaortic tissue revealed retroperitoneal fibrosis accompanying atherosclerotic aortae. Corticotherapy and antilipemic drugs were given. After 3 years a complete remission of periaortic pathologic mass was observed. This case could prove the autoimmunological hypothesis of retroperitoneal fibrosis.