Aim. To evaluate the relevance of the positron-emission therapy (PET) for optimization of the therapy of advanced Hodgkin's lymphoma (HL) using the intensive EACOPP-14 program. Materials & Methods. 91 patients with advanced HL (IIX-IIE, III-IV) received the treatment according to the “ЛХМосква1-3” protocol over the period from November 2009 to February 2015, and then the treatment was analyzed. The median age was 29 years (range: 17-50); there were 42 men (46.3 %) and 49 (53.7 %) women. The treatment included 6 cycles of polychemotherapy according to the regimen ЕА(50)С0РР-14 ± radiation therapy. The radiation therapy was performed in 66 patients (72.5 %) after the completion of the chemotherapy. The cumulative focal dose was 30 Gy onto the areas of residual lesions and/or initially large tumor masses. Results. PET performed during the initial HL diagnosing permited to identify new areas of neoplastic lesions without changes in staging and treatment scheme, as well as specify areas and field size of planned radiation consolidation. The paper confirms the prognostic value of the intermediate PET in patients with advanced HL during the intensive first-line chemotherapy. The intensive therapy at the beginning of the treatment program is associated with higher chances for survival for patients with extremely unfavorable prognosis. After completion of the drug therapy, negative PET findings had a higher prognostic value, than the positive ones. The analysis of the relevance of residual tumor dimensions in the PET negative group demonstrated that the relapses were more common, if the residual tumor was more than 4.5 cm (according to CT findings). Conclusion. This study confirmed that it reasonable to discuss the discontinuation of the radiation therapy in patients with advanced HL, negative PET findings and small (< 2.5 cm) residual tumor after the intensive ЕАСОРР-14 program. This tactics permits avoiding a number of delayed complications.

Aim. To assess the efficacy and toxicity of intensive 6 courses EACOPP-14 treatment with or without radiotherapy (RT) for advanced stages of Hodgkin's lymphoma (HL). Materials & Methods. From November 2009 to February 2015, 95 patients with advanced stages of HL (IIX-IIE, III-IV) aged between 17 and 50 years (median 29 years) were selected for the participation in the protocol ЛХМосква1-3. The study population consisted of 46.3 % men and 53.7 % women. The results of the treatment were assessed in 91 patients who have received more than 2 courses of EACOPP-14. The follow up period was at least 3 months after the receiving the therapy. Consolidation RT with a total dose of 30 Gy for residual tumor lesions and/or initially large tumors was performed after the chemotherapy. Results. Complete remission was achieved in 82 (90.1 %) patients, partial remission in 2 (2.2 %), and the progression was observed in 7 (7.7 %) patients. The overall 4-year survival rate was 90.8 %, the progression-free survival was 88.2 %. The toxicity of the ЕАСОРР-14 program was slightly lower than that of 8 courses of ВЕАСОРРesc, and was comparable to the toxicity of other modifications of intensified ВЕАСОРР scheme. Hematological toxicity grade 3 and 4 was most commonly observed: leukopenia was observed after 64.9 % of courses, anemia - after 24 % of courses, thrombocytopenia - after 3.8 % of courses. The rate of infections did not singificantly differ and accounted for 24 %. The most frequent non-infectious complications were mucositis (21.1 %) and polyneuropathy (11.7 %). Complications resulted in the change of treatment in only 3 (3.01 %) of patients. The exclusion of bleomycine from the ЕАСОРР-14 program reduced the frequency of RT complications. Grade 3 pulmonitis developed in 4.5 % of cases, while radiation-induce pulmonary fibrosis verified by CT developed in 15.2 % of cases. The ЕАСОРР-14 6 courses program showed its high efficacy both with and without RT, high tolerance and the possibility of full administration for the majority of patients with the various stages of HL. Conclusion. Current research showed the efficacy of treatment without RT for patients with advanced stages of HL with negative PET results and small (< 2.5 cm) residual tumors after intensive ЕАСОРР-14 program. This approach allowed to avoid a number of late treatment complications.

Primary mediastinal (thymic) large B-cell lymphoma (PMB-CL) is one of the primary extranodal tumors and originates from thymic medulla B cells. The disease is more common in young women and declares itself by mainly locally advanced growth within the anterior upper mediastinum with frequent involvement of chest organs. PMBCL has specific morphological, immunological, and genetic characteristics that permit to differentiate it from other similar diseases: diffuse large В-cell lymphoma, nodular sclerosis Hodgkin’s lymphoma, and mediastinal gray zone lymphoma. Immunochemotherapy with subsequent irradiation of the residual mediastinal tumor is the standard treatment of PMBCL. No benefits of one drug therapy over another have been demonstrated to date in controlled studies. Application of new imaging techniques (PET/CT) may result in withdrawal of the radiotherapy in some PMBCL patients without impairment of delayed survival rates.

Актуальность. Первичная медиастинальная (тимическая) В-крупноклеточная лимфома (ПМВКЛ) относится к первичным экстранодальным опухолям и происходит из В-клеток мозгового слоя вилочковой железы. Болезнь имеет специфические иммуноморфологическую и генетическую характеристики, которые позволяют выделить ее среди других, сходных по своим параметрам злокачественных лимфопролиферативных заболеваний. Стандартом лечения ПМВКЛ является иммунохимиотерапия с последующим облучением остаточной опухоли в средостении. К настоящему времени преимуществ одного метода лекарственного противоопухолевого воздействия перед другим в рамках контролируемых исследований не показано. Цель. Изучить современные подходы к химиолучевому лечению больных ПМВКЛ с попыткой их индивидуализации с учетом различных прогностических факторов. Материалы и методы. Анализу подвергнуты данные 131 больного с впервые выявленной ПМВКЛ, которые получали лечение в НМИЦ онкологии им. Н.Н. Блохина с 2000 по 2017 г. Более половины больных были женщины (58 %), медиана возраста составила 30 лет (диапазон 16-70 лет). На разных исторических этапах лечение ПМВКЛ проводилось с использованием различных режимов иммунохимиотерапии: MACOP-B±R-у 55 (42 %) пациентов, R-CHOP-у 40 (30,5 %), R-DA-EPOCH-у 36 (27,5 %). Лучевую терапию получили 99 из 131 больного. Результаты. Лечение во всей группе больных ПМВКЛ (n = 131) в целом оказалось высокоэффективным. Частота ремиссий составила 87 %, 3-летняя выживаемость без прогрессирования (ВБП) и общая выживаемость (ОВ)-78 и 88 % соответственно. При медиане наблюдения 37 мес. у 17 (13 %) из 131 больного в сроки до 13 мес. от начала противоопухолевого лечения развились рецидивы или констатировано прогрессирование заболевания. Ни одного LYMPHOID TUMORS

It is the first description of a case of follicular lymphoma with a loss of CD20 antigen expression during the anti-tumor treatment including rituximab in the NN Blokhin Russian Cancer Research Center. The article discusses the tactics of further management of such patients and the effect of the CD20-negative status of follicular lymphoma tumor cells acquired during immunochemotherapy.