treatment of central nervous system lymphoma — literature review and own experiences

Central nervous system (CNS) involvement in advanced non-Hodgkin’s lymphoma (NHL) occurs in 5–29 % of cases. Primary CNS lymphoma (PLCNS) significantly less revealed: 1–2 % of lymphoma cases and 5 % of all malignant CNS diseases. Historically, PLCNS treated with radiotherapy, but the majority of patients had no long-term remission. Combined treatment (chemotherapy + radiation therap y) has been developed to improve radiotherapy efficacy. The research results, according to several authors, allowed to develop the bas is of modern medical approaches, which includes a combination of high-doses methotrexate and cytarabine with radiation therapy for remission consolidation. New drugs — temozolomide, topotecan and rituximab — in combination with conventional preparates have been studied. Treatment results of 11 patients with primary (8) or secondary (3) CNS lymphomas treated in Botkin Municipal Clinical Hospital was analyzed. In 9 from 11 (all with primary lesion) diffuse B-large cell lymphoma w as diagnosed (by immunohistochemistry). All primary patients received 3.5–5 g/m2 methotrexate and 2–4 doses 2 g/m2 cytarabine (except 2 patients); 3 patients in addition received ifosfamide, vincristine and etoposide under a pediatric protocol BFM-90. Subsequently , all patients received 46 Gy cranial irradiation. 75 % of pa tients achieved complete or partial remission. One patient died from infectious complication after 2nd chemotherapy course. 2 patients have early progression. Five patients are alive with follow-up from 6 months to 3.5 years and 4 of them remains in remission. Therapy with methotrexate + cytarabine was accompanied by III–IV grade neutropenia in the majority of patients, but its duration w as not great. The data obtained are consistent with results of modern treatment protocols PLCNS.