In our 98 patients all treated by association chemotherapy + cobaltherapy, 37 cases were stages III and IV and 71 cases were of diffuse pathology classification. Meanwhile the results were not so poor: 66% at 5 years survival (all stages) and 69% for stages I and II. The curves of survival rate generally stabilize at 7 years. The prognostic depend of the pathology class: diffuse LBS and diffuse HBS have an evolution similar to acute leukemia (44.5% and 19% at 7 years survival), on the opposite nodular LBS, diffuse LCS have 100% survival at 7 years. Diffuse cases have visceral relapses (liver, bone marrow, Waldeyer ring) or generalized lymphatic involvement; nodular cases have generally localized and only lymph-nodes relapses. The best results by large fields irradiation suggest a contiguous extension of the disease, but there is also distant lymph nodes relapses. In the nodular cases, relapses can be generally cured by localized radiotherapy. In the diffuse case, we do not know if it is better to give total lymphnode irradiation (or to give more chemotherapy with economic irradiation). 10 gastro-intestinal cases were treated by moving strip technique with excellent tolerance and 67.5% at 5 years survival. These results show that interesting results may be obtained in non Hodgkin lymphomas by association of chemotherapy, with selective and moderately large fields irradiation, even in disseminated cases, even in diffuse cases.