[Results of radiation therapy of stage I and II nodal non-Hodgkin's lymphoma originated in the cervical lymph nodes--a study of the Japan Lymphoma Radiation Therapy Study Group].

During the years 1972-81, 118 patients with stage I (78 cases) and II (40) nodal non-Hodgkin's lymphoma originated in the neck were treated with radiation. 5 year survival rates were 74% for stage I and 40% for stage II. Favorable histology group showed better prognosis than unfavorable one. Among stage I patients with unfavorable histology group, prognostic factors were studied and tumor size larger than 4 cm is found to be a sole prognostic factor.