[Tumoral pathology of the jejunum. Apropos of 5 cases]

1654 cases of tumour of the digestive tube operated on in the Department of General Clinical Surgery and Surgical Therapy of the University of Pavia, during the period 2nd half 1964--1st half 1977, have been considered. Four primary tumours (1 leiomyoma, 2 adenocarcinomas, 1 reticulosarcoma) and one secondary tumour (metastases of retroperitoneal sarcoma) occurred in the jejunum and their pathology is examined from the etiopathogenetic and anatomoclinical viewpoints.