Duodenal tumours.

Duodenal tumours is an extremely fragmentary topic since the experience of various specialists: gastroenterologists, pathologists, radiologists and surgeons is involved. At present, correct epidemiologic data is lacking whereas much progress has been made in the diagnostic field, thanks to the endoscopic, histologic and radiologic techniques. Thus a different classification scheme has been suggested in the attempt to codify the fundamental aspects of this lesion. An interdisciplinary data base has been proposed in order to provide useful data for an epidemiological evaluation.