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Peripheral T-cell lymphomas (PTCLs) are a heterogeneous group of lymphoproliferative disorders, accounting for about 10 % of all non-Hodgkin lymphomas. The most common subtype is peripheral T-cell lymphoma, unclassified (PTCL-NOS), accounting for about 26 % of all PTCLs. PTCL-NOS is associated with less favorable overall survival (OS) and progression-free survival (PFS) compared with aggressive B-cell lymphomas. The role of radiation therapy in the treatment of PTCL-NOS is still not definitively defined. The results of many studies show that the addition of radiation therapy to the treatment regimen is associated with a significant improvement in survival in patients with early-stage PTCL-NOS, but in the later stages, the benefit of radiation therapy is not obvious., Objective: peripheral T-cell lymphoma, unspecified is a clinically and biologically heterogeneous disease with a poor prognosis. Since the role of radiation therapy is still unclear, a study was conducted to evaluate the effectiveness of radiation therapy in peripheral T-cell lymphoma, unspecified., Materials and Methods: The work is based on clinical observations and treatment results of patients who were diagnosed between 2013 and 2023 at the National Cancer Institute (in the period from 2020 to 2023, patients were observed and treated as part of research). 56 patients were included in the study., Results: The work analyzed the immediate results of the treatment of patients with peripheral T-cell lymphoma, unspecified depending on the stage and type of treatment, as well as the overall survival of these patients. When analyzing the overall response to the treatment of patients with I/II stages of the disease, it was proven that this indicator is higher in the group of patients who received chemoradiotherapy, compared to patients who received only chemotherapy (100 % versus 83.3 %), and this indicator was higher due to patients who demonstrated a complete response to therapy (75 % vs. 50 %). Analyzing the response to treatment of patients with III/IV stages of the pathological process, it was established that there was no difference in the overall response to treatment, the level of complete and partial response to treatment. Analysis of the overall survival of patients with I/II stages of the disease, with a median follow-up of 60 months, demonstrated a significant improvement in overall survival in the group of patients who received chemoradiotherapy compared to the group of patients who received only radiation therapy (median 48 vs. 22 months). Overall 1-year (78 % vs. 69 %), 3-year (64 % vs. 40 %), and 5-year (48 % vs. 35 %) were also higher in the chemoradiotherapy group. In the group of patients with III/IV stages of the disease, there was no difference in overall survival between patients who received chemoradiotherapy and patients who received only chemotherapy (median 16 vs. 13 months, 1-year survival 54 vs. 52, 3-year survival 33 vs. 30 and 5-year overall survival of 23 vs. 20 %., Conclusions: The addition of radiation therapy to the treatment plan demonstrated a significant improvement in the overall response and overall survival of patients with peripheral T-cell lymphomas, unspecified with I and II stages of the pathological process, but in III and IV stages of the disease, the benefit of radiation therapy has not been proven., (I. Kriachok, O. Aleksyk, I. Tytorenko, M. Bushuieva, Y. Moroz.)

Determination the complex of new prognostic risk factors will optimize and improve treatment and survival of patients with primary Hodgkin's Lymphoma.

Presented literature data on the occurrence, diagnosis and treatment of primary lymphoma of bone. Case reports described in medical practice.

The analysis of the specifics of the flow of Non-Hodgkin's lymphomas in elderly patients is presented. Comparative analysis of the treatment efficacy and toxicity with schemes CHOP and CNOP in patients is presented.

Achievements of world practice about development and prophilaxis of tromboembolic events (VTE) in cancer patients. Particular attention is paid to prevention of VTE in patients with multiply myeloma who receive chemotherapy with Thalidomide.

Management of non-Hodgkin's lymphomas (NHL) has been significantly changed during last 40 years from radiotherapy to modern polychemotherapy with application of monoclonal antibodies. A ten year experience of the treatment of patients with B-cell NHL with rituximab application was accumulated in National Cancer Institute. The group of patients with NHL, who were treated in oncohematology department in the period from 2001 to 2010, was chosen for study of the efficacy of the treatment with rituximab. The immediate and distant results of the treatment were evaluated in this group of patients. The usage of the polychemotherapy with rituximab was highly efficient in the treatment of primary and relapsed patients with NHL. This group shows high rate of the immediate and distant results of treatment.

The results of treatment of patients with multiple myeloma with thalidomide and complications of this treatment are presented. Monotherapy with thalidomide and its combinations with corticosteroids and cytostatics is an effective as first line treatment and as a treatment of patients with refractory disease. The most common side effect is toxic neuropathy. Other complications are less common and are easily controlled with medications.

The treatment of patients with refractory forms of Hodgkin's lymphomas in combination with chemo-radiotherapy is priority. Nevertheless, chemotherapy has to include multicomponent schemes and radiation therapy should be an addition and consolidative method to chemotherapy.

Clinical-and-hematological characteristics are presented of B-cell chronic lymphoid leukosis in those persons who took part in the elimination of the effects of the Chornobyl accident in the remote period. Results are highlighted of treatment of 16 patients with making use of different chemical drug preparations. Employment of fludarabin and cyclophosphan combined in treatment of the medical condition in question has been shown to promote long-term complete and partial remissions in a major proportion of patients, which effect was not achievable with standard means of remediation. A side effect of fludarabin was leukocytopenia that in the presence of changed immunity threatened the patients with development and exacerbation of infections complications. Use of manax and erbisol moderated the immunosuppressive and toxic action of fludarabin, due to which fact infectious complications and drug-induced hepatitis have came to be less common, the patients' quality of life gotten better.