[Malignant tumors of the digestive tract below the diaphragm in young people].

We have retrospectively studied 1243 malignancies of the infradiaphragmatic tract treated in the First Surgical Clinic between 1978-1994 (678 gastric, 300 rectal and 256 colonic malignancies). Out of these 39 cases have been encountered in young patients (14 gastric, 13 colon and 12 rectal malignancies). The following particularities have been noted in this group: hereditary predisposition, more advanced stage at diagnosis, predominance of non-Hodgkin lymphomas and poorly differentiated forms. Young age does not significantly influence prognostic, with the control group. In young people the most important prognostic factors are tumor stage, cellular grading and tumor DNA index as determined by flow cytometry.