Overall survival of children and adolescents with mature B cell non-Hodgkin lymphoma who had rAmong the 1,111 registered on study, 104 patients (9.4%) had refractory disease or disease relapse after first complete remission. Among these 104 patients, 28 (27%) patients had refractory disease and 76 (73%) had relapsed disease.efractory or relapsed disease during or after treatment with FAB/LMB 96