[Duodeno-ileal fistula development due to retroperitoneal lymph node metastases of sigmoid carcinoma]

We report on a 75-year-old patient suffering from persistent diarrhea with consecutive weight loss of 50 kg over a nine month period. Three years ago the patient had been operated on a sigmoid cancer. Ultrasonography and CT-scan revealed retroperitoneal masses due to lymph node metastases. Enteroclysis demonstrated a fistula between the duodenum and the terminal ileum. Whereas duodenocolic fistulae due to malignancies are well known to the best of our knowledge a fistula between retroperitoneal parts of the duodenum and the intraperitoneal intestine have not descripted so far.