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Mantle cell lymphoma (MCL) is a rare and clinically aggressive lymphoma subtype. Current approaches have greatly improved patients outcomes, but relapse is inevitable. In phase IIIII clinical trials, ibrutinib has shown significant activity in patients with relapsed or refractory (R/R) MCL.To assess efficacy and toxicity of ibrutinib monotherapy in patients with R/R MCL in routine practice outside of clinical trials.The study enrolled patients with confirmed R/R MCL who had received at least one line of previous chemotherapy. ECOG 24, cytopenia, infectious complications, hemorrhagic syndrome were not exclusion criteria. Patients received daily oral ibrutinib 560 mg until progression or unacceptable toxicity.From May 2015 to September 2020 ibrutinib therapy was started in 106 patients with R/R MCL in 16 regions of Russia. The median age was 66 years; ECOG2 18%, blastoid variant (or Ki6740% or WBC50109/l) 43%. The median number of previous treatment lines was 2 (111). The ORR was 78.4% (CRR 27.4%). The median PFS was 13.6 months and OS 23.2 months. In the blastoid group the median PFS was 4.4 months vs 36.5 months in the alternative group (p0.001), the median OS 9.0 vs 41.0 (p=0.001). The median OS of patients after progression on ibrutinib was 3.2 months. The common complications are hemorrhages (63%), diarrhea (62%), myalgia and muscle cramps (60%), infections (31%), skin and nail toxicity 15%, arrhythmia 8%. None of recipients had to completely discontinue ibrutinib therapy due to complications.Ibrutinib is effective and well tolerated in routine practice of R/R MCL treatment and our results are consistent with international clinical trials. The favorable toxicity profile and the high response rate made it possible to prescribe ibrutinib in severe somatic status, cytopenia, and even in the presence of infectious complications.Обоснование. Лимфома из клеток мантийной зоны (ЛКМЗ) редкая и агрессивная В-клеточная лимфома. Интенсификация химиотерапии значительно улучшила результаты лечения, но развитие рецидива неизбежно. В исследованиях IIIII фазы ибрутиниб продемонстрировал высокую эффективность у пациентов с рецидивом и резистентным (р/р) течением ЛКМЗ. Цель. Оценить эффективность и токсичность монотерапии ибрутинибом у пациентов с р/р ЛКМЗ в повседневной практике. Материалы и методы. В исследование включены пациенты с подтвержденным диагнозом р/р ЛКМЗ, получившие не менее одной линии химиотерапии. Тяжелый соматический статус, цитопения, инфекционные осложнения и геморрагический синдром не служили противопоказаниями для начала терапии. Ибрутиниб назначался в дозе 560 мг ежедневно до прогрессирования или развития неприемлемой токсичности. Результаты. С мая 2015 по сентябрь 2020 г. включены 106 пациентов в 16 регионах России. Медиана возраста 66 лет; ECOG2 18%; бластоидный вариант (или Ki6740%, или WBC50109/л) 43%. Медиана предшествующих линий терапии 2 (111). Общий ответ достигнут у 78,4% (полная ремиссия 27,4%). Медиана беспрогрессивной выживаемости (БПВ) 13,6 мес, общей выживаемости (ОВ) 23,2 мес. При бластоидном варианте медиана БПВ составила 4,4 мес против 36,5 мес в альтернативной группе (p0,001), медиана ОВ 9,0 мес против 41,0 мес (р=0,001). Медиана ОВ при развитии резистентности к ибрутинибу 3,2 мес. Наиболее частые осложнения: геморрагии (63%), диарея (62%), миалгии и мышечные судороги (60%), инфекции (31%), кожная токсичность 15%, аритмия 8%. Ни одному из пациентов полностью терапию ибрутинибом из-за токсичности не остановили. Заключение. Ибрутиниб эффективен и хорошо переносится в рутинной практике терапии р/р ЛКМЗ, а результаты согласуются с данными международных исследований. Благоприятный профиль токсичности и высокая частота ответов позволили назначать ибрутиниб при тяжелом соматическом статусе, цитопении или наличии инфекционных осложнений.

Background. The management of aggressive lymphomas in pregnancy depends on the time of diagnosis and immu-nomorphological variant of tumor. The rarity of aggressive lymphomas in pregnant women, the absence of consistent approaches to the treatment of such patients, the lack of data on physical growth of children as well as the incidence of newborns’ congenital and acquired pathology make this subject of vital importance. Aim. To analyze the treatment results in patients with newly diagnosed aggressive lymphoma at different stages of pregnancy. Materials & Methods. From 1993 to 2020 at the National Research Center for Hematology 74 pregnant women with lymphomas were treated. Aggressive tumors were detected in 17 (23 %) of them: primary mediastinal (thymic) large B-cell lymphoma (п = 14), anaplastic large-cell lymphoma ALK+ (п = 1), high-grade B-cell lymphoma, unspecified (п = 1), and diffuse large B-cell lymphoma (п = 1). The median age of patients was 30 years (range 21-37 years). The median pregnancy stage on the diagnosis of aggressive lymphoma was 21 weeks (range 11-32 weeks). Results. In 1 case on the diagnosis of aggressive lymphoma at 11 weeks gestation dexamethasone 8 mg daily was administered up to the second trimester of pregnancy, afterwards the patient received polychemotherapy. On the diagnosis of aggressive lymphoma in the second (п = 13) and third (п = 2) trimesters of pregnancy the patients received polychemotherapy followed by delivery. In the third trimester of pregnancy delivery was performed with subsequent polychemotherapy in 1 patient. There were born 18 babies (1 pregnancy was multifetal): 8 girls and 10 boys. Conclusion. As a result of the chosen tactics and the work of interdisciplinary team of doctors all patients, who completed the treatment, are followed-up in complete remission. All born babies, despite chemotherapy and perinatal complications, are alive and develop without abnormalities.

Aim. To compare NHL BFM-90 and CHOEP efficacy in adult patients with ALK-positive anaplastic large-cell lymphoma (ALK+ ALCL). Materials & Methods. Within the period from June 2014 to December 2019 the prospective randomized comparative study at the National Research Center for Hematology in Moscow included 23 ALK+ ALCL patients. In one study arm (n = 11) CHOEP was administered, whereas the other one (n = 12) received high-dose chemotherapy (CT) according to NHL BFM-90 protocol. The median age of patients in both arms was 33 and 40 years, respectively. Results. Overall survival (OS) and event-free survival (EFS) within 3 years were 91 % in the arm receiving CHOEP (this protocol was administered to all 11 patients), and 100 % in the arm receiving NHL BFM-90 (complete remission was achieved in all patients). Due to its toxicity NHL BFM-90 was fully implemented in 9 out of 12 patients. The 3-year OS and EFS in the CHOEP and NHL BFM-90 arms are comparable, and the difference between them is not significant. Conclusion. In ALK+ ALCL treatment high-dose CT according to NHL BFM-90 protocol has no advantage in terms of the 3-year OS and EFS compared to less toxic regimen CHOEP. A larger sample of patients is required to achieve significant results, which will further lead to a final judgement on feasibility of high-dose regimens in the treatment of adult patients with ALK+ ALCL.

Aim. To set survival parameters for follicular lymphoma (FL) patients with different PRAME expression levels in tumor cells. Materials & Methods. The study was conducted on samples of lymph nodes, blood, and bone marrow of 34 patients with newly diagnosed FL. PRAME expression levels were measured in tumor cells (centrocytes and centroblasts) by quantitative real-time PCR. The impact of different PRAME expression levels on survival parameters was studied with median follow-up of 29 months. Clinical and laboratory characteristics used for FLIPI-1 and FLIPI-2 calculations in different patient groups were compared. Results. A high (> 5 % against ABL control gene) PRAME expression level correlates with higher Ki-67 activity (p = 0.043) and larger tumor mass (p = 0.04). Survival parameters were worse with high PRAME expression level in FL cells. Combination of both high FLIPI-1/FLIPI-2 risk and high PRAME expression level determines extremely unfavorable prognosis and may result in death. Conclusion. In FL patients high PRAME expression level in tumor cells has negative prognostic value, but only in the presence of parameters determining high FLIPI-1 and FLIPI-2 risk. Juxtaposition of PRAME expression level and FLIPI-1/ FLIPI-2 values enables most reliable prediction of early mortality in FL patients.

This study conducted the possibilities of diffusion-weighted magnetic resonance imaging of the whole body diffusion WB-MRI (in comparison with positron emission tomography with computed tomography PET/CT) in assessing the volume and prevalence of the tumor, as well as determining bone marrow (BM) damage (for various cytological types) in the diagnosis and staging of the disease in patients with FL.A prospective comparative search study included 15 patients (4 men and 11 women, with a median age of 53 years) with newly diagnosed FL. Patients have not received antitumor chemotherapy previously. After the diagnosis was established, all patients (with the blindness of both the cases themselves and some specialists regarding the results of other specialists) were examined by PET/CT and diffusion WB-MRI, after which a BM examination was performed (histological examination and determination of B-cell clonality in BM puncture by PCR). Using the diffusion WB-MRI method, the prevalence of tumor lesion (nodal and extranodal foci) in each patient was estimated, and the total tumor volume was calculated, BM lesion was detected, and BM lesion volume was calculated. For lesions of different localization, the measured diffusion coefficient (DC) of the diffusion WB-MRI and the standardized rate of accumulation of the radiopharmaceutical in tissues (SUV) of the PET/CT method were determined and compared with each other (for the same areas). Statistical analysis was performed using the estimate of agreement (by Cohens kappa coefficient and asymptotic test) of the results of the compared methods.Estimates of the prevalence of tumor damage (lymph nodes and extranodal foci) using the diffusion WB-MRI and PET/CT methods were the same. High DC and SUV were observed in the peripheral lymph nodes, extranodal foci and bulky, low DC and SUV in the foci of BM. All 4 methods successfully determined BM damage, however, the diffusion WB-MRI had comparatively less negative results. The highest values of SUV and CD were noted in cases of the 3 grade of FL. Using the diffusion WB-MRI method, the prevalence of tumor lesion was assessed in each patient (nodal and extranodal foci were detected) and the total tumor volume was calculated, BM lesion detection was performed, and the volume of BM lesion was calculated. It is important to note that with the help of diffusion WB-MRI, it was possible to measure separately the total tumor volume (462025 cm3) and separately the volume of bulky (251358 cm3). The diffusion WB-MRI allowed us to differentiate the volume of tumor tissue (reduced as a result of treatment) and residual (fibrous-adipose) tissue in residual formations (which averaged 21% of the initial volume). The predictors of a poor antitumor response were the maximum SUV values (more than 14.0) and the minimum DC values (0.510-3mm2/s) in the BM foci.The diffusion WB-MRI allows for detailed visualization of BM lesions and surrounding soft tissues both in the debut of the FL and in the process of tracking the effectiveness of chemotherapy, which makes it possible to use it along with PET/CT. Diffusion WB-MRI allows to separately evaluate the volume of true tumor tissue and residual tissue. Cases of the 3 grade of FL (including the transformation of FL into diffuse B-large cell lymphoma) are isolated due to low DC values (and high SUV values) in the tumor tissue. BM foci of FL lesion also have (in comparison with nodal and extranodal foci) lower DC values. The predictors of a poor antitumor response were high (from 14.0 or more) SUV valuesin the tumor (and especially in bulky), and low (about 0.5103mm2/s) DC values of BM foci. The PET/CT and diffusion WB-MRI have proven to be reliable diagnostic tools for establishing the stage of FL and detecting BM damage. Diffusion WB-MRI for FL is an informative first-line diagnostic method that allows regular monitoring of the disease and early detection of foci of relapse and disease progression.Цель.Изучение возможностей диффузионно-взвешенной магнитно-резонансной томографии всего тела МРТ-ДВИ-ВТ (в сравнении с позитронно-эмиссионной томографией с компьютерной томографией ПЭТ/КТ) в оценке объема и распространенности опухоли, а также определении поражения костного мозга (при различных цитологических типах) при диагностике и стадировании заболевания у больных фолликулярной лимфомой (ФЛ). Материалы и методы.В проспективное сравнительное поисковое исследование включены 15 пациентов (медиана возраста 53 года) с впервые диагностированной ФЛ. Противоопухолевую химиотерапию пациенты ранее не получали. После установления диагноза все пациенты обследованы методами ПЭТ/КТ и МРТ-ДВИ-ВТ, им также выполнено исследование костного мозга (гистологическое исследование, определение В-клеточной клональности в пунктате костного мозга методом полимеразной цепной реакции). Методом МРТ-ДВИ-ВТ у каждого пациента оценена распространенность опухолевого поражения, подсчитан суммарный объем опухоли, выполнена детекция поражения костного мозга и подсчитан объем костномозгового поражения. Для очагов поражения разной локализации определены и сопоставлены друг с другом (для одних и тех же зон) измеряемый коэффициент диффузии (ИКД) метода МРТ-ДВИ-ВТ и стандартизированный показатель накопления радиофармпрепарата в тканях (SUV) метода ПЭТ/КТ. Статистический анализ проведен c использованием оценки согласия (с коэффициентом каппа Коэна и асимптотическим тестом) результатов сравниваемых методов. Результаты.Оценки распространенности опухолевого поражения методами МРТ-ДВИ-ВТ и ПЭТ/КТ совпали. Высокие значения ИКД и SUV отмечались в периферических лимфатических узлах, экстранодальных очагах и bulky, низкие значения в очагах поражения костного мозга. Все 4 метода успешно определяли поражение костного мозга, однако у метода МРТ-ДВИ-ВТ отмечено сравнительно меньше отрицательных результатов. Самые высокие значения SUV (метод ПЭТ/КТ) и ИКД (метод МРТ-ДВИ-ВТ) отмечались в случаях 3-го цитологического типа ФЛ. Методом МРТ-ДВИ-ВТ у каждого пациента оценена распространенность опухолевого поражения и подсчитан суммарный объем опухоли, выполнена детекция поражения костного мозга и подсчитан объем костномозгового поражения. С помощью МРТ-ДВИ-ВТ удалось измерить отдельно общий объем опухоли (462025 см3) и отдельно объем опухолевых конгломератов bulky (251358 см3). Метод МРТ-ДВИ-ВТ позволил провести дифференциальную диагностику объема опухолевой ткани (редуцировавшей в результате лечения) и резидуальной (фиброзно-жировой) ткани в остаточных образованиях, который составил в среднем 21% от исходного объема. Предикторами плохого противоопухолевого ответа оказались максимальные значения SUV (более 14,0) и минимальные значения ИКД (0,510-3мм2/с) в костномозговых очагах. Заключение.Метод МРТ-ДВИ-ВТ позволяет получать детализированную визуализацию костномозговых очагов поражения и окружающих мягких тканей как в дебюте ФЛ, так и в процессе мониторирования эффективности полихимиотерапии; позволяет раздельно оценивать объем истинной опухолевой ткани и остаточного образования. Случаи 3-го цитологического типа ФЛ вычленяются благодаря низким значениям ИКД (и высоким значениям SUV) в опухолевой ткани. Костномозговые очаги поражения ФЛ также имеют более низкие значения ИКД. Предикторами плохого противоопухолевого ответа оказались высокие (от 14,0 и более) значения SUV в опухоли (и особенно в bulky) и низкие (около 0,5103мм2/с) значения ИКД костномозговых очагов. Методы ПЭТ/КТ и МРТ-ДВИ-ВТ показали себя как надежные диагностические инструменты для установления стадии ФЛ и детекции поражения костного мозга. МРТ-ДВИ-ВТ при ФЛ является информативным диагностическим методом первой линии, позволяющим проводить регулярный мониторинг заболевания и обеспечивать раннее выявление очагов рецидивирования и прогрессирования заболевания.

Mantle cell lymphoma (MCL) is aggressive B-cell neoplasm diagnosed predominantly among older men. R-CHOP-like regimens allow to achieve high response rate, but the overall survival (OS) are disappointingly short - 3-4 years. An addition of high - dose cytarabine to the upfront therapy and autoSCT significantly improved outcomes but remain feasible largely for medically fit patients. Based on the activity and good tolerance of gemcitabine - oxaliplatin schemes in relapsed and refractory MCL patients, we developed an alternative first - line course for patients who are not eligible for R-HD-MTX-AraC.Assess toxicity and efficacy of R-DA-EPOCH/ R-HD-MTX-AraC and R-DA-EPOCH/R-GIDIOX schemes, autoSCT and R-maintenance in untreated MCL patients.47 untreated MCL patients from 6 centers were enrolled in prospective study between April 2008 and September 2013. All patients have stage II-V; ECOG 0-3; median age 55 years (29-64); Male/Female 76%/24%. MIPIb: 28% low, 33% intermediate and 39% high risk. Following 1st R-EPOCH patients were assigned to receive either R-DA-EPOCH/ R-HD-MTX-AraC or R-DA-EPOCH/ R-GIDIOX regimen. In the absence of renal failure, hematological toxicity grade 4 more than 3 days and severe infections patients received R-HD-MTX-AraC scheme (R 375 mg/m2 Day 0, Methotrexate 1000 mg/m2/24 hours Day 1, AraC 3000 mg/m2 q 12 hrs Days 2-3). Patients who had at least one of these complications received R-GIDIOX scheme (R 375 mg/m2 day 0, gemcitabine 800 mg/m2 days 1 and 4, ifosfamide 1000 mg/m2 days 1-5, dexamethasone 10 mg/m2 IV days 1-5, irinotecan 100 mg/m2 day 3, oxaliplatin 120 mg/m2 day 2). Subsequently these courses were alternating with R-DA-EPOCH in each arm of the protocol. Depending on the time of achieving CR patients received 6 or 8 courses, unless they progressed on therapy. Those patients who achieved PR/CR/CRu underwent autoSCT (BEAM-R). Post - transplant R-maintenance was administered for 3 years (R - 375 mg/m2 every 3 months).29/47 patients were treated on R-HD-MTX-AraC arm (median 50 years; MIPIb: 35.7% low, 28.6% intermediate, 35.7% high risk) and 18/47 patients were on R-GIDIOX arm (median 60 years; MIPIb: 16.7% low, 38.9% intermediate, 44.4% high risk). In R-HD-MTX-AraC arm CR rate was 96.5%. In R-GIDIOX arm OR and CR rates were 94.4% and 77.7% respectively. Main hematological toxicity of R-GIDIOX was leukopenia gr. 4 occurred in 74.1%. With median follow - up of 76 months, the estimated 7-years OS and EFS in R-HD-MTX-AraC arm are 76% and 57% respectively. In R-GIDIOX arm the estimated 7-years OS and EFS are 59% and 44%, respectively. There are no statistical differences in EFS (p=0.47) and OS (p=0.06) between two arms.The use of a risk - adapted strategy allowed 95.7% of patients achieve PR/CR/CRu, performed autoSCT and begun R-maintenance therapy with rituximab. None of the patients needed a premature discontinuation of therapy because of unacceptable toxicity. The performance of autoSCT and R-maintenance apparently allowed to partially offset differences in the intensity of induction therapy and to maintain comparable results of therapy in both induction arms.Лимфома из клеток мантийной зоны (ЛКМЗ) является агрессивной В-клеточной лимфомой, диагностируемой преимущественно у мужчин старшей возрастной группы. Применение R-CHOP-подобных схем позволяет у большинства больных достигнуть общий ответ (ОО), но медиана общей выживаемости (ОВ) составляет всего 3-4 года. Добавление к терапии высоких доз цитарабина и аутологичной трансплантации стволовых кроветворных клеток (аутоТСКК) увеличивают частоту достижения полных ремиссий (ПР) и продолжительность жизни, но только у соматически сохранных пациентов. Основываясь на высокой эффективности и безопасности гемцитабин - и оксалиплатинсодержащих схем в терапии рецидивов ЛКМЗ, мы предложили альтернативный курс терапии первой линии R-GIDIOX для пациентов, не являющихся кандидатами для применения высоких доз цитарабина и метотрексата (R-HD-MTX-AraC). Цель. Оценка эффективности и токсичности схем альтернирующей терапии R-DA-EPOCH/R-HD-MTX-AraC или R-DA-EPOCH/ R-GIDIOX, аутоТСКК и поддерживающей терапии ритуксимабом у вновь заболевших больных ЛКМЗ. Материалы и методы. В проспективное исследование с апреля 2008 по сентябрь 2013 г. включено 47 пациентов из 6 центров. Медиана возраста - 55 (29-64) лет, отношение мужчины/женщины - 76%/24%. Во всех случаях диагноз подтвержден выявлением t(11;14)(q13;q32); ECOG 0-3; распределение по MIPIb: 28% - низкий, 33% - промежуточный и 39% - высокий риск. В зависимости от переносимости первого курса терапии R-EPOCH пациенты рекрутировались в ветвь более интенсивной терапии R-DA-EPOCH/ R-HD-MTX-AraC или менее интенсивной терапии R-DA-EPOCH/R-GIDIOX. При отсутствии гематологической токсичности 4-й степени более 3 сут, серьезных инфекционных осложнений и признаков почечной недостаточности пациентам проводился курс R-HD-Met-AraC (R 375 мг/м2 в день 0, метотрексат 1000 мг/м2/24 ч в день 1, цитарабин 3000 мг/м2 2 раза в день в дни 2-3). При развитии одного из вышеперечисленных осложнений за первым курсом R-EPOCH следовал курс R-GIDIOX (R 375 мг/м2 в день 0, гемцитабин 800 мг/м2 в дни 1 и 4, ифосфамид 1000 мг/м2 в дни 1-5, дексаметазон 10 мг/м2 внутривенно в дни 1-5, иринотекан 100 мг/м2 в день 3, оксалиплатин 120 мг/м2 в день 2). Далее курсы полихимиотерапии (ПХТ) чередовались в каждом рукаве протокола. В зависимости от времени достижения ПР проводилось от 6 до 8 курсов терапии. При достижении частичной ремиссии (ЧР) и более выполнялась аутоТСКК (BEAM-R). Затем проводилась поддерживающая терапия ритуксимабом в дозе 375 мг/м2 1 раз в 3 мес в течение 3 лет. Результаты. Включено 29 из 47 пациентов в группу R-HD-MTX-AraC (медиана возраста 50 лет; MIPIb: 35,7% - низкий, 28,6% - промежуточный, 35,7% - высокий риск) и 18 из 47 - в группу R-GIDIOX (медиана возраста 60 лет; MIPIb: 16,7% - низкий, 38,9% - промежуточный, 44,4% - высокий риск). ПР в группе R-HD-MTX-AraC достигнута у 96,5%. Общий ответ и ПР в рукаве R-GIDIOX достигнуты в 94,4 и 77,7% соответственно. Лейкопения 4-й степени развилась после 74,1% курсов R-GIDIOX. Семилетняя ОВ и бессобытийная выживаемость (БСВ) в группе R-HD-MTX-AraC составили 76 и 57% соответственно, а в группе R-GIDIOX - 59 и 44% (при медиане наблюдения 76 мес). Сравниваемые группы статистически значимо не различались как по БСВ (p=0,47), так и по ОВ (p=0,36). Заключение. Применение риск - адаптированной стратегии позволило в 95,7% случаев достигнуть ответа на терапию, выполнить аутоТСКК и начать поддерживающую терапию ритуксимабом. Никому из больных не потребовалось преждевременного прекращения терапии из - за неприемлемой токсичности. Выполнение аутоТСКК и поддерживающей терапии ритуксимабом позволило частично нивелировать различия в интенсивности индукционной ПХТ и получить сопоставимые результаты лечения в обеих ветвях терапии.

Background: Follicular lymphoma (FL) is characterized by clinical and morphological heterogeneity. It is based on the pathogenetic mechanisms of the development of tumor cells. The identification and assessment of risk factors associated with the course of the disease and treatment outcome in FL is an important task, as it allows to evaluate and predict the effectiveness of therapy. Objective: Identify and estimate risk factors for overall survival (OS) and progression free survival (PFS) in FL. Patients and Methods: The prospective exploratory study conducted at National Research Center for Hematology (Moscow) from 01/2017 to 04/2021 included patients (pts)(in total, 80) with FL. Morpho-immunohistochemical, cytogenetic and molecular studies were performed on biopsies of lymph nodes taken before the start of therapy. The mutational status of exon 16 and intron polymorphism rs_2072407 of the EZH2 gene were investigated by Sanger sequencing. 18q21/BCL-2 rearrangements were determined by conventional cytogenetic analysis and/or FISH study. The results obtained in a blind study were compared with the effect of the therapy. Results: Of the 80 pts 34 were male: Me (median) age 50 years (range 30-72) and 46 were female: Me 56 (range 21-81). The median follow-up (FU) time was 53 months. As a result of the study in the multivariate Cox regression model (likelihood-ratio test, p=0.01) of significant factors, selected in the previously univariate analysis, the following statistically significant (Wald test) risk factors for OS and PFS (the events: progression, relapse, or death) were obtained: • BCL-2 gene rearrangements (no vs yes) • EZH2 gene genotypes (AA/AG vs GG) • proliferation index Ki-67 (>35%) • morphological grade (3А vs 1/2) • tumor size (>6 cm /bulky/) (Tab. 1, Fig. 1) The BCL-2 rearrangements were found in 45 from 80 pts (56%; 95 % CI 45-66). The probability of BCL-2 rearrangements is estimated to be about 0.5 (50%). According to the results of Cox-regression analysis (by OS) in the absence of BCL-2 rearrangements, the risk of death in FL was generally significantly (p = 0.01) higher than in the group with its presence: HR = 4.3 (95 % CI 1.5-13.0) (Fig. 2) Mutations in the 16th exon of the EZH2 gene (mutEZH2) were found in 10/80 (13%) pts. Analysis of EZH2 gene mutations with BCL-2 rearrangements revealed that in the mutEZH2 group with the presence of BCL-2 rearrangements, the number of deaths associated with progression is significantly less than in the control initial groups (mutEZH2 with BCL-2 rearrangements - 0/6, mutEZH2 without BCL-2 rearrangements - 2/4, wEZH2 with BCL-2 rearrangements - 3/39 (8%), wEZH2 without BCL-2 rearrangements - 11/31 (35%)) . The prognostic significance of EZH2 genotypes in lymphomas was studied for the first time in this study. The frequencies of rs_2072407 genotypes were: AA - 24% (19), AG - 42% (34), and GG - 34% (27). AA and AG genotypes of the EZH2 gene in pts with FL were associated with an increased risk of death (compared to the GG genotype) : HR = 2.9 (95% CI: 1.2-10.6), p = 0.01 (Fig. 3). The GG variant in most cases was associated with wEZH2 (26/27 (96%)) with BCL-2 rearrangements (16/26 (62%)) and a favorable prognosis (26/27 (96%)) (p = 0.01). Index of proliferative activity Ki-67> 35% (n = 40) and Ki-67 ≤ 35% (n = 40) were equally common in the study group. With a Ki-67> 35%, the probability of death is 2.9 (95% CI 1.1-9.7) times higher. The frequency distribution of morphological grade was as follows: grade 3A - 53% (n = 43) and grade 1-2 - 47% (n = 37). At grade 3A, the probability of death is 2.5 (95% CI 1.1-7.8) times higher. The number of pts with tumor size >6 cm (bulky) and ≤ 6 cm in the sample is approximately the same (41 and 39, respectively), the presence of bulky increased the mortality risk by 2.1 (95% CI 1.0-6.5) times. A short time from the manifestation of the disease to appeal to medical care is a predictor of poor prognosis, but this result we received earlier on a large sample of pts was not significant on a smaller sample. Conclusions: As a result of the multivariable Cox regression analysis, we identified and confirmed the previously obtained factors (bulky, grade 3A, Ki-67 > 35%, short medical history), and discovered new biogenetic factors (BCL-2 rearrangements and the GG rs2072407 genotype of the EZH2 gene). The model based on these independent risk factors improves the accuracy of predicting adverse events and allows to use more personalized treatment options for patients with FL. Figure 1 Figure 1. Disclosures No relevant conflicts of interest to declare.

Background. Grade 3 follicular lymphoma (FL) is a heterogenetic group of tumors. The selections of patients with similar characteristics of the tumor process is important for classification 3 grade forms of FL and risk stratification, as well as for the development of new therapeutic approaches. Different morphological, immunohistochemical and cytogenetical characteristics of the tumor result in different clinical forms of the disease. Aim. To describe the clinical, morphological, immunohistochemical and cytogenetical characteristics of grade 3 FL and evaluate their prognostic value for R-CHOP-21 chemotherapy. Materials & Methods. We performed retrospective and prospective analysis of morphological, immunohistochemical and genetical characteristics of 93 primary patients with grade 3 FL (21-78 years, median 53 years, women to men - 1:1.4) admitted to National Medical Hematology Research Center from years 2001 to 2016. Morphological and immunohistochemical assessment of the affected lymph nodes and bone marrow biopsy material was performed. Data obtained from the standard cytogenetic and FISH assessment were compared to identify the BCL2 rearrangement. Results. We proposed an algorithm for differential diagnosis of the 2 types of grade 3 FL: de novo FL (n = 22) and transformed FL (n = 21). De novo grade 3 FL had the immunophenotype of CD10- in 19 (86 %) cases, MUM1++ (monomorphically) in 19 (90 %), and BCL-2 in 5 (22 %). It was characterized by the absence of the BCL2 rearrangement (n = 22, 100 %) and bone marrow involvement (n = 14, 67 %) and/or bone marrow involvement (n = 7, 100 %). Third grade FL transformed from grades 1 or 2 had was CD10+ (n = 19, 90 %), MUM1+ (heterogeneously, n = 16, 76 %) or MUM1-(n = 4, 19 %), BCL-2+ (n = 20, 95 %) and had BCL2 rearrangement (n = 19, 90 %). Small cell bone marrow involvement was observed in 71 % of cases, whereas large cell involvement was seen predominantly in de novo FL (p = 0.06). The analysis showed that 5-year relapse-free survival in patients with grade 3 de novo FL after R-CHOP-21 therapy was 87 % compared to 16 % with transformed FL (p = 0.06) for the median 41 months of follow up. Conclusion. We described the morphological, immunohistochemical and cytogenetical characteristics of grade 3 de novo FL and grade 3 FL, transformed from grades 1 or 2. The described variants show different sensitivity to immunochemotherapy.

Aim. Pathomorphological, immunophenotypical and clinical characteristics of a new clinico-morphological form of pediatric-type follicular lymphoma (FL) in young adults discovered in 2008 (WHO classification). Background. FL is a heterogeneous disease according to its morphological, immunophenotypical and molecular-genetic characteristics. FL de novo includes transformed FL, FL without t(14;18), FL with diffuse growth associated with del(1p.36) and TNFRSF14 mutation. Pediatric-type FL in young adults is poorly studied; and it is especially interesting because of its clinical diversity and molecular-genetic heterogeneity of FL, in general. Methods. Biopsy materials taken from 5 patients (aged 18-25 years; median age: 22 years; the female/male ratio 3:2) were included in the study; all patients were examined, diagnosed and treated in the Hematology Research Center over the period from 2012 to 2016. Clinical stage I with isolated involvement a palatine tonsil or an inguinal lymph node was diagnosed in 4/5 patients; clinical stage II with involvement of a palatine tonsil and cervical lymph node was diagnosed in 1/5 patients. Morphological, immunophenotypical and FISH tests were performed with paraffin blocks. Results. The morphological pattern was typical for FL 3B (n = 2) and FL 3 with blastoid nucleus morphology (n = 3). Immunophenotypical features demonstrated an intermediate position between FL 3 de novo and transformed FL 3. No BCL-2 rearrangement was detected in any observation. Conclusion. The comparison of our data on characteristics of pediatric-type FL with those published in the literature demonstrated that lack or weak expression (< 30 % of tumor substrate cells) of MUM1 was the key feature of the experimental group of young adults with pediatric-type FL. This, in turn, indicates the absence of IRF4 rearrangements and possible presence of other genetic abnormalities. The clinical, morphological, and immunophenotypical characteristics broaden the FL heterogeneity spectrum in young adults.

Context: Lymphoproliferative diseases (LPD) occurring during pregnancy present the treating physician with unique diagnostic and therapeutic challenges, such as aiming to achieve maternal cure without impairing fetal health, growth, and survival. Design: Analysis of the treatment results of patients with aggressive LPD diagnosed at different stages of pregnancy. Setting: From 2009 to 2020, 16 pregnant women with aggressive LPD were treated in the National Research Center for Hematology. Patients or other participants: Primary mediastinal large B-cell lymphoma (n = 13), ALK + anaplastic large-cell lymphoma (n = 1), high-grade B-cell lymphoma (n = 1), diffuse large B-cell lymphoma (n = 1). The median age was 30 (21–37) years. Results: When diagnosing LPD in the second trimester of pregnancy (TP), chemotherapy (CT) was performed followed by delivery (n = 13), when diagnosed in III TP, depending on gestational age, either delivery followed by CT (n = 1), or performed CT and delivery at a later gestational age (n = 2). All patients at the time of diagnosis had indications for CT. Treatment of patients was performed according to the protocol: DA-EPOCH±R - 9, VACOP-B - 5, CHOEP - 1, CHOP - 1. The gestational age at the time of delivery after CT was 34 (25–36) weeks. Currently, all patients are alive and are in complete remission of the disease. The median follow-up was 41 (1–246) months. Seventeen children were born (1 pregnancy was multiple): they are alive, healthy, and without developmental disabilities. The age of children at the time of data analysis ranges from 1 month to 10 years. Conclusions: As a result of the chosen management tactics, all patients are alive, in complete remission of the disease, and the children are practically healthy.

To characterize a group of patients with follicular lymphoma (FL) with leukemization and to evaluate the efficiency of different therapy options (R-CHOP/R-FMC/high-dose chemotherapy (HDCT)).18 (7.2%) out of 250 patients diagnosed with FL, who were examined and treated at the National Research Center for Hematology, Ministry of Health of the Russian Federation, were found to have leukemic FL (tumor cells in the peripheral blood smears were detected by cytology and flow cytofluorometry. Eight of the 18 patients had extranodal foci of involvement: lung, stomach, spleen, lumbar muscles, upper jaw, and vertebrae. Bone marrow was involved in 17 of the 18 patients. Tumor biopsy specimens displayed a morphological pattern of indolent FL in the majority of patients (10 of the 18 patients had cytological grade 1-2 tumors and 14 patients had a nodular or nodular-diffuse tumor growth pattern). The patients underwent R-CHOP/R-FMC) or HDCT cycles as first-line therapy, followed by autologous stem cell transplantation (auto-SCT).The median follow-up was 66 months (range 12-217 months). The 5-year overall survival (OS) and progression-free survival (PFS) rates were 70% (10% SEM) and 35% (15% SEM), respectively. The median OS was not reached; the median PFS was 3 years.Leukemic FL is characterized by low OS and PFS rates. The most effective chemotherapy regimens were R-CHOP, followed by HDCT and auto-SCT in first remission or R-FMC. These cycles can to a greater extent achieve a complete eradication of the bone marrow tumor clone. Due to the relapsing course of FL and the aggressiveness of leukemic FL, it is expedient to carry out auto-SCT in first remission.Цель исследования. Охарактеризовать группу больных фолликулярной лимфомой (ФЛ) с лейкемизацией и оценить эффективность разных вариантов терапии (R-CHOP/R-FMC/высокодозной химиотерапии - ВХТ). Материалы и методы. Из 250 пациентов с диагнозом ФЛ, которые обследовались и получали терапию в ФГБУ ГНЦ МЗ РФ, у 18 (7,2%) выявлен лейкемический вариант ФЛ (обнаружены опухолевые клетки в мазках периферической крови цитологически и методом проточной цитофлюориметрии - ПЦФМ). У 8 из 18 пациентов определялись экстранодальные очаги поражения: вовлечение легких, желудка, селезенки, поясничных мышц, верхней челюсти, позвонков. В 17 из 18 случаев вовлечен костный мозг. Морфологически в биоптате опухолей у большинства пациентов отмечалась картина индолентной ФЛ (у 10 из 18 I-II цитологический тип опухоли, у 14 из 18 нодулярный и нодулярно-диффузный характер опухолевого роста). В качестве терапии первой линии пациентам проводились курсы R-CHOP/R-FMC или ВХТ с последующей трансплантацией аутологичных стволовых клеток крови (ауто-ТСКК). Результаты. Медиана наблюдения составила 66 мес (12-217 мес). Пятилетняя общая выживаемость (ОВ) и выживаемость без прогрессирования (БПВ) составили 70% (стандартная ошибка 10%) и 35% (15%) соответственно. Медиана общей продолжительности жизни не достигнута, медиана продолжительности жизни без прогрессирования составила 3 года. Заключение. Лейкемический вариант ФЛ характеризуется низкими ОВ и БПВ. Наиболее эффективными оказались следующие химиотерапевтические режимы: R-CHOP c последующей ВХТ и ауто-ТСКК в первой ремиссии или R-FMC. Данные курсы позволяют в большей степени добиться полной эрадикации опухолевого клона в костном мозге. В связи с рецидивирующим течением ФЛ, а также агрессивностью лейкемического варианта ФЛ в первой ремиссии целесообразно проводить ауто-ТСКК.

To evaluate the prognostic significance of tumor-associated cytotoxic lymphocytes and macro-phages, an immunohistochemical study of lymph node biopsies obtained from patients with follicular lymphoma (FL) was carried out. The immunohistochemical survey was performed using anti-granzyme B and anti-CD68 antibodies before the patients received the anti-FL treatment. It was shown that the number of cytotoxic lymphocytes (cytotoxic T lymphocytes and NK cells) in patients with good outcome (group 1, n = 31) was significantly higher (p ≤ 0.05) than in patients with poor outcome (group 2, n = 28). The number of CD68-positive macrophages in tumors with nodular-diffuse type of growth in group 2 was significantly higher (p ≤ 0.01) than in group 1. An increased number of cytotoxic lymphocytes may point to the activation of adaptive immunity that favors the good outcome of the disease. In contrast, an increased number of macrophages was associated with a poor outcome of FL. These data suggest that the parameters of cellular microenvironment can be used as prognostic criteria of the FL outcome. Further investigations are needed for the elucidation of the role of the cellular microenvironment in the FL development.

BACKGROUND: Follicular lymphoma (FL) is a B-cell tumor, which in most patients is characterized by slow growth and an "indolent" clinical course. In 80% of patients bone marrow is affected, which is a reflection of the pathogenesis of the tumor. The "watch and wait" tactic is a frequently used variant of patient management. For effective therapy, it is necessary to establish the stage of the disease, which requires the examination of the bone marrow (bilateral trepanobiopsy) and the identification of nodal and extranodal lesions (using PET/CT or CT of the whole body). The use of these methods is associated with high radiation exposure and the risk of complications in the intravenous radiopharmaceuticals and contrast agents. Whole body diffusion-weighted magnetic resonance imaging (WB-DWI) makes it possible to detect the burden of the tumor process without the use of contrast agents. AIM: Assess the capabilities of the WB-DWI method for determining the prevalence of a tumor and the detection of BM lesions in patients with FL. PATIENTS AND METHODS: The study was conducted during the fourth quarter of 2018 in the National Research Center for Hematology (Moscow), covered 8 patients (3 men and 5 women, with an average age of 53 years). According to the developed design of the study at the time of diagnosis of PL, all patients underwent a WB-MRI study, and then performed (with masking of participants): PET/CT, a histological examination of the bone marrow and the determination of B-cell clonality in bone marrow punctate (using PCR method). The results of the last two examinations were taken as reference (true) estimates for the detection of bone marrow lesions, and compared with the results obtained using the WB-MRI and PET/CT methods. Cohen's kappa statistical coefficient was used to assess the agreement between comparing methods. RESULTS: All 8 patients had a generalized lesion of the lymph nodes and extranodal foci (stage 4 according to An-Arbor). It was found that the measured diffusion coefficient in the lesions of the BM was 0,5‒0,9 х 10-3 mm/s. Reference tests showed that in 7 out of 8 patients, BM was affected. PET/CT gave two false-negative results, WB-DWI - one false-negative results (Tables 1‒2). Estimates of the prevalence of lesions of the lymph nodes and extranodal foci by WB-DWI and PET/CT were consistent with the accuracy of the methods. Estimates of the extent of lymph node involvement and extranodal lesions using WB-DWI and PET/CT were coincided with the accuracy of the methods errors. CONCLUSION: The results (Table 3.) of this exploratory research show that the WB-DWI method reveals a bone marrow damage not worse than the PET/CT method: kappa coefficient for WB-DWI was 0.6 and for PET/CT ‒ 0,5, respectively (due to the small sample size, strict statistical significance was not reached). WB-DWI allows you to quickly and informatively determine the affected areas and the involvement of BM, and thereby establish the stage of the disease. The results suggest an opportunity (along with the PET/CT method) to use the WB-DWI method as well. Disclosures No relevant conflicts of interest to declare.

to evaluate the efficiency of high-dose chemotherapy (HDCT) with further autologous blood stem cell transplantation (auto-BSCT) in the first-line therapy of patients with follicular lymphoma (FL) and poor prognostic factors.In 2000 to 2015, the National Research Center for Hematology, Ministry of Health of the Russian Federation, performed therapy in 39 patients with FL and poor prognostic factors (a total of 215 patients with FL). The R-CHOP treatment was done as induction therapy. Sequential HCT and further auto-BSCT were performed in 29 (74%) of the 39 patients, who had shown a partial tumor response to the induction therapy or achieved partial remission after 4-6 cycles of CT, but had poor prognostic factors. 22 of the 29 patients underwent auto-BSCT in first-line therapy after induction R-CHOP regimens. Among them, there were 17 men with a median age of 46 years (31-68 years). 21 of the 22 patients were recorded to have Stage IV by the Ann Arbor staging classification. Bulky peritoneal and retroperitoneal tumors larger than 7 cm were detectable at disease onset in 14 of the 22 cases. Two patients were noted to have phenomena of leukemization. 16 patients had bone marrow (BM) involvement. According to the Follicular Lymphoma International Prognostic Index-1 (FLIPI-1), the patients were divided into 3 groups: 1) a low risk (n=5); 2) an intermediate risk (n=3); a high risk (n=14). B-symptoms were observed in 16 cases. 16 patients were diagnosed with cytological grade I-II FL and 6 had grade IIIA. According to the tumor proliferative pattern, the distribution turned out to be as follows: nodular (n=6), nodular-diffuse (n=13), and diffuse (n=3). The proliferative activity index averaged 30% (8-90%). Serum and urine proteins were immmunochemically assayed in 18 cases, out of them 8 patients were diagnosed as having serum β2-microglobulin concentrations above normal as a poor prognostic factor. In 14 of the 22 patients, the activity of lactate dehydrogenase was greater than normal (266-7806 U/l).Out of the 22 patients, 20 who have undergone auto-BSCT in first-line therapy are survivors and have remission of the underlying disease: 18 and 2 patients achieved complete and partial remission, respectively. The follow-up period was 7 to 178 months (median, 32 months). After auto-BSCT in the first remission, 2 patients developed disease recurrences: an early recurrence after 9 months in one case and a late recurrence 6 years after completion of therapy in the other.The first prospective study of intensive therapy for FL in Russia has demonstrated that HDCT with further auto-BSCT in first-line therapy allows complete remission in patients with poor prognostic factors and higher overall and progression-free survival rates.Цель исследования. Оценить эффективность высокодозной химиотерапии (ХТ) с последующей трансплантацией аутологичных стволовых клеток крови (ауто-ТСКК) в терапии первой линии у больных с фолликулярной лимфомой (ФЛ) и факторами неблагоприятного прогноза. Материалы и методы. В период с 2000 по 2015 г. в ФГБУ Гематологический научный центр МЗ РФ проводилась терапия 39 пациентам с ФЛ и факторами неблагоприятного прогноза (всего 215 больных с ФЛ). В качестве индукционной терапии проведено лечение по программе R-CHOP. У 29 (74%) из 39 пациентов в случае частичного ответа опухоли на индукционную терапию или достижения частичной ремиссии после 4-6 курсов ХТ, но при наличии факторов неблагоприятного прогноза, выполнена последовательная высокодозная химиотерапия (ПВХТ) с последующей ауто-ТСКК. Из 29 больных ауто-ТСКК в терапии первой линии после индукционных режимов по программе R-CHOP выполнена 22 больным. Из них 17 мужчин с медианой возраста 46 (31-68) лет. У 21 из 22 больных констатирована IV стадия заболевания по классификации Ann Arbor. В 14 из 22 случаев в дебюте заболевания определялись опухолевые конгломераты более 7 см внутрибрюшной или забрюшинной локализаций (bulky). У 2 больных отмечались явления лейкемизации. У 16 пациентов имелось поражение костного мозга (КМ). По критериям FLIPI-1 пациентов разделили на 3 группы: в 1-й группе риска было 5 больных, во 2-й - 3, в 3-4-й - 14. В 16 случаях наблюдалось наличие В-симптомов. У 16 пациентов диагностирован I-II цитологический тип ФЛ, у 6 - IIIА. По характеру пролиферации опухоли распределение оказалось следующим: нодулярный у 6 больных, нодулярно-диффузный - у 13, диффузный - у 3. Индекс пролиферативной активности в среднем составил 30% (8-90%). Иммунохимическое исследование белков сыворотки крови и мочи проведено в 18 случаях, из них концентрация β2-микроглобулина в сыворотке выше нормы, как фактор неблагоприятного прогноза, диагностирована у 8 из 18 больных. Активность лактатдегидрогеназы превышала норму (266-7806 ед/л) у 14 из 22 пациентов. Результаты. Из 22 пациентов 20, перенесшие ауто-ТСКК в терапии первой линии, живы и находятся в ремиссии по основному заболеванию: полная ремиссия достигнута у 18, частичная - у 2. Период наблюдения составляет от 7 до 178 (медиана 32) мес. У 2 пациентов после ауто-ТСКК в первой ремиссии развились рецидивы заболевания: в одном случае - ранний спустя 9 мес, во втором случае - поздний спустя 6 лет от окончания терапии. Заключение. Результаты первого проспективного исследования интенсивной терапии у больных ФЛ в России демонстрируют, что ПВХТ с последующей ауто-ТСКК в терапии первой линии позволяет достичь полной ремиссии заболевания у пациентов с факторами неблагоприятного прогноза, а также увеличить общую и беспрогрессивную выживаемость.

The practical adoption of the Khimik-Analitik information system in the environmental laboratory at OAO Koks is discussed. The benefits of electronic document manipulation in the laboratory are out-lined.

The purpose of the study was to evaluate high-dose chemotherapy efficacy with the next autologous stem cells transplantation (ASCT) in first-line treatment of follicular lymphoma (FL) patients with unfavorable prognosis factors. 43 FL patients with unfavorable prognosis factors were observed in Hematological scientific center from 2000 to 2016. The patients received R-CHOP regime as induction therapy. ASCT in first-line treatment after inductional R-CHOP regimes was administrated in 23 patients. The results of the first prospective study of high-dose therapy in FL patients in Russia demonstrate that HDCT with followed ASCT in first line therapy allows to achieve complete remission in patients with unfavorable prognosis factors as well as to increase progression-free survival and overall surviva.

Background: FL is one of the most frequent types of lymphomas: it consists about 22% of non-Hodgkin lymphomas in Russia. 20 % of pts have an aggressive tumor after standard therapy. In FL pts with unfavorable prognosis (FLIPI-1 III-IV, fast growth of tumor mass, B-symptoms, third cytological grade of tumor, bulky, absence of tumor response after first line R-CHOP-21 therapy) autoSCT allows to increase the overall (OS) and progression-free survival (PFS). Aim: To estimate an efficacy of HDT (high dose therapy) with following autoSCT in front-line therapy of FL pts with factors of poor prognosis. Patients and Methods: Since 2000 to 2015 years in National Research Center for Hematology were treated 39 FL pts with poor prognosis. All pts received R-CHOP-21 induction therapy. In 24 patients (62%) who hadn't partial response or poor prognosis patients with partial response after 4-6 courses autoSCT was performed. This group consists of 17 males and 7 females with median age 46 years old (31-68). Majority of pts (23/24) had IV stage of disease according to Ann Arbor. In 16/24 (66%) cases pts had bulky disease. 3/24 pts had phenomenon of leukaemization. Basing on FLIPI-1 criteria all pts were divided into 3 groups: low risk - 5/24, intermediate - 3/24, high - 16/24. B-symptoms were in majority of cases (18/24). 18/24 pts were diagnosed with I-II cytological grade of FL, 6/24 - III A/B. Basing on tumor growth pattern there was following ratio: nodular tumor growth revealed in 6/24 pts, nodular-diffuse tumor growth - in 15/24, diffuse tumor growth - in 3/24. Immunochemical analysis of serum and urine proteins was performed in 20/24 cases, among them increased level of serum β2-microglobulin was diagnosed in 10/20 pts. Increased activity of lactate dehydrogenase (LDH) was revealed in 16/24 pts. Bone marrow involvement at the time of disease onset was diagnosed in 18/24 pts. Results: After induction R-CHOP-21 chemotherapy pts underwent HDT which included two courses R-DHAP, following high-dose cyclophosphamide with rituximab, then high dose etoposide with rituximab. As condition regimen R-BEAM was performed. All 24 FL pts, who underwent autoSCT, continue to be in complete remission. Median follow-up was 31 months (7-178). Conclusions: Preliminary results of the first prospective study of intensive therapy of FL in Russia demonstrate that autoSCT in front line therapy provides to achieve a complete remission in pts with poor prognosis and allows to increase an overall and disease-free survival. Disclosures No relevant conflicts of interest to declare.

Introduction. Primary mediastinal B-cell lymphoma (PMBCL) amounts from 0,9 to 4% of Non-Hodgkin Lymphomas. Predominantly suffer young women. All relapses in PMBCL occur as early events. Taking into account unfavorable prognosis in case of relapse or progression of PMBCL (2-year overall survival (OS) is about 15% [Kurvilla J., 2008]), it's necessary to achieve a complete remission (CR) in first line treatment. Aim. To compare an efficacy of R-DA-EPOCH followed by R-DHAP and autologous peripheral blood stem cell transplantation (autoSCT) with BEAM conditioning regimen with modified (m) NHL-BFM-90 chemotherapy protocol in pts with partial remission (PR) of PMBCL. Patients and Methods. In 107 pts (34 males, 73 females) diagnosis of PMBCL was established according to WHO criteria. All pts had stage II of disease according to Ann Arbor classification. 30 pts received R-DA-EPOCH, 77 pts - m-NHL-BFM-90 ± R. Median age of pts in R-DA-EPOCH group was 28 years old (from 20 to 67 years old); in m-NHL-BFM-90 ± R-group - 77 years old. Increased LDH concentration was revealed in 24 from 30 (80%) pts in R-DA-EPOCH group and in 75/77 (97%) pts from m-NHL-BFM-90 ± R group. Bulky mediastinal disease was in 30/30 (100%) pts in R-DA-EPOCH group and in 59/77 (76%) - m-NHL-BFM-90 ± R group. In case of CR after 6 courses according to computer tomography and PET scanning treatment was completed. In case of PR pts underwent 2 R-DHAP courses with autoSCT (BEAM conditioning regimen). All pts from m-NHL-BFM-90 ± R group independently from PET-results stopped treatment. All cases of treatment failure occurred till one year of observation. Kaplan-Meier method was used to calculate OS and relapse-free survival (RFS). OS was defined as time from diagnosis to death from any reason; RFS was defined as time from diagnosis until relapse or death from any cause. Results: After 6 R-DA-EPOCH therapy CR was achieved in 24/30 (80%) pts, 6/30 (20%) pts had PR and underwent 2 R-DHAP courses followed by auto-SCT (BEAM). 2- RFS and OS was 100%. Median follow up was 16 months. In m-NHL-BFM-90 ± R group 10-year RFS and OS were 85% and 92%, respectively. Median follow up was 53 months. Conclusion: High dose pulsed m-NHL-BFM-90-chemotherapy as well as R-DA-EPOCH allows getting high efficacy of primary mediastinal B-cell lymphoma therapy. Although future analysis will show more distant results of R-DA-EPOCH chemotherapy. Disclosures No relevant conflicts of interest to declare.

BACKGROUND: Follicular lymphoma (FL) is one of the most frequent types of B-cell lymphomas and accounts for about 22% of all non-Hodgkin lymphomas in Russia. The disease is usually a long-term condition with frequent relapse. At the same time 15-20% of pts have fast-tumor progression. Patients (pts) of this group die within the first 1.5-2 years from the time of diagnosis. High-dose chemotherapy (HDT) followed by ASCT in the presence of nonfavorable characteristics of FL (fast growth of tumor volume, B-symptoms, third citological grade of tumor, large tumor size, absence of anti-tumor response to R-CHOP courses in the first remission) increases the overall survival and progression-free survival of pts. AIM: To estimate HDT with ASCT efficiency among pts with FL in front-line therapy who received treatment in the National Research Center for Hematology during 2000-2013. PATIENTS AND METHODS: The results of ASCT among 12 pts with FL have been analyzed: 8 male and 4 female aged from 31 to 50 with median age 43. Patients in the main group (11/12) were on the IVth stage of tumor growth. In 6/12 cases the tumor size was more than 6 sm. Among 7/12 pts, besides lesions of lymphatic nodes, extra nodal lesions were found: infiltration in psoas (1/12), kidney (1/12), stomach (1/12), lungs (1/12), thyroid (1/12), pancreas (1/12). In 2/12 cases leukaemization was observed. Based on FLIPI criteria all the pts were divided into three groups: in the first risk group - 5/12 pts, in the second - 3/12, in the third - 4/12. B-symptoms were in the majority of cases (9/12). 9/12 pts were diagnosed with I-II cytological grade of FL, among 3/12 - III A/B. Based on the character of tumor growth the dispersion was the following: nodular tumor growth - 5/12, nodular-diffuse tumor growth-6/12, diffuse tumor growth - 1/12. Immuno-chemical investigation of protein serum and urine was performed in 9/12 cases, and among them rising serum β2-microglobulin above the norm was observed in 4/9 pts. A rise in lactate dehydrogenase concentration above the norm was observed among 4/12 pts. Lesion of bone marrow at the beginning of the disease was identified among half of the pts (6/12). Induction courses were performed on the R-CHOP programs, with intensive therapy - on protocol mNHL-BFM-90. RESULTS: Anthracycline courses were prescribed for nearly all of the pts as an inductive therapy: R-CHOP (11/12). mNHL-BFM-90 protocol was chosen as an inductive regime because of the fast growth of tumor size, IIIB grade of FL in 1/12 case. This tumor growth behaved like diffuse large B-cell lymphoma. In three cases medical-diagnostic splenectomy was undertaken before chemotherapy. After the inductive regimes the pts were given HDT based on the following scheme: two courses R-DHAP, course with rituximab and high-doses cyclophosphamide, a course with rituximab and high doses of etoposide, R-BEAM. All 12 pts, who were given ASCT are in full remission on the main disease. The period of observation is from 13 to 164 months. CONCLUSION: This first experience of intensive therapy in FL in Russia demonstrates that ASCT as a front-line therapy leads to complete remission of FL among pts who have nonfavorable prognosis factors. Disclosures No relevant conflicts of interest to declare.

To evaluate the efficiency and toxicity of the intensive Burkitt's lymphoma (BL) therapy protocol BL-M-04.A total of 70 patients diagnosed with BL, including 45 men and 25 women whose age was 15 to 62 years (median age 31 years), were followed up in 2003 to 2014. Stage I (according to S. Murphy) was diagnosed in 4 (5.7%) patients; II in 9 (12.9%), III in 25 (35.7%), IV in 11 (15.7%), and Burkitt's leukemia in 21 (30%). There were tumor involvements of the bone marrow and central nervous system in 23 (32.9%) and 15 (21.4%) patients, respectively. B symptoms were detected in 56 (80%) patients; enhanced lactate dehydrogenase (LDH) activity was found in 50 (78.1%) out of 64 patients; moreover, in 34 (56.2%) out of 64 patients, LDH activity was more than twice as high as the reference values. The median LDH activity was 2398 (238-20,300) U/I. Acute renal failure at disease onset was identified in 17 (24.2%) patients; chemotherapy was initiated in 8 patients during renal replacement therapy. The treatment was performed using the BL-M-04±R protocol (4 successive blocks of A-C-A-C±R). Six blocks of A-C-A-C-A-C with rituximab has been carried out in patients with bone marrow involvement since 2011.Sixty-two (89%) patients achieved complete remission. At this time, 6 patients died from therapy complications during remission induction; 2 patients were observed to have disease progression; 3 developed disease recurrence (2 patients had early recurrence; 1 patient developed recurrence 2 years after treatment). Five-year overall survival (OS) was 85%; 5-year relapse-free survival (RFS) was 95%. The Cox multivariate regression analysis revealed that Burkitt's leukemia and bone marrow involvement were independent factors that influenced OS and RFS. The poor somatic status (3-4 ECOC scores versus 0-2 scores) proved to be statistically significant for OS rather than RFS.Despite the optimistic results obtained by our study group, there is a need to further improve BL treatment protocols and to elaborate novel approaches to therapy particularly for older patients and patients with Burkitt's leukemia.Лимфома Беркитта (ЛБ) является одной из наиболее агрессивных В-клеточных лимфом и характеризуется преимущественно экстранодальной локализацией опухоли, частым вовлечением в опухолевый процесс костного мозга (КМ) и центральной нервной системы (ЦНС). Отличительной чертой ЛБ является высокая пролиферативная активность опухолевых клеток (Ki-67 ~100%) и наличие перестройки гена c-MYC в область тяжелых или легких цепей иммуноглобулина. Цель исследования. Оценка эффективности и токсичности интенсивного протокола терапии лимфомы Беркитта ЛБ-М-04. Материалы и методы. С 2003 по 2014 г. наблюдали 70 больных с диагнозом ЛБ: 45 мужчин и 25 женщин в возрасте от 15 до 62 лет, медиана возраста 31 год. I стадия заболевания по S. Murphy диагностирована у 4 (5,7%) больных, II - у 9 (12,9%), III - у 25 (35,7%), IV - у 11 (15,7%), лейкоз Беркитта - у 21 (30%). У 23 (32,9%) пациентов отмечено вовлечение в опухолевый процесс костного мозга, у 15 (21,4%) больных - ЦНС. В-симптомы выявлялись у 56 (80%) пациентов, повышение активности лактатдегидрогеназы (ЛДГ) - у 50 (78,1%) из 64, при этом у 34 (56,2%) из 64 отмечено повышение активности ЛДГ более чем в 2 раза по сравнению с референсными значениями. Медиана активности ЛДГ составила 2398 (238-20 300) ед/л. Острая почечная недостаточность в дебюте заболевания определялась у 17 (24,2%) больных, у 8 химиотерапия начата на фоне терапии, замещающей функцию почек. Лечение проводили по протоколу ЛБ-М-04±R, (4 последовательных блока А-С-А-С±R). С 2011 г. больным с поражением КМ проводили 6 блоков А-С-А-С-А-С с ритуксимабом. Результаты. Полная ремиссия заболевания достигнута у 62 (89%) больных. При этом 6 пациентов умерли от осложнений терапии в период индукции ремиссии, у 2 наблюдалась прогрессия заболевания, у 3 развился рецидив заболевания (у 2 ранний, у 1 через 2 года после завершения лечения). 5-Летняя общая выживаемость (ОВ) составила 85%, 5-летняя безрецидивная выживаемость (БРВ) - 95%. При проведении многофакторного регрессионного анализа Кокса выявлено, что лейкоз Беркитта и поражение КМ являются независимыми факторами, влияющими на ОВ и БРВ. Плохой соматический статус (оценка по шкале ECOG 3-4 балла по сравнению с 0-2 баллами) оказался статистически значимым для ОВ, но не для БРВ. Заключение. Несмотря на оптимистичные результаты, полученные нашей исследовательской группой, необходимы дальнейшее совершенствование протоколов лечения ЛБ, разработка новых подходов к терапии, особенно у пациентов старшей возрастной группы, и больных лейкозом Беркитта.