Analyses of dose-response in radiotherapy for patients with mature T/NK-cell lymphomas according to the WHO classification.
ABSTRACT This study was conducted to analyze the influence of radiotherapy doses and chemotherapy doses and clinical parameters on in-field disease control in order to assess the optimal radiation doses for treatment of mature T/NK-cell lymphomas according to the newly proposed WHO classification.
Subjects consisted of 62 patients with mature T/NK-cell lymphomas treated with radiotherapy at four Japanese institutions between 1983 and 2002. We reevaluated all histopathological specimens of non-Hodgkin's lymphomas (NHL), using the WHO classification. Radiation therapy was usually delivered to the involved field. The majority of patients also received adriamycin-based chemotherapy such as CHOP, modified CHOP, or more intensive chemotherapy.
There were no significant differences in radiosensitivity among subtypes of mature T/NK-cell lymphomas, at least between extranodal NK/T-cell lymphomas, nasal type and peripheral T-cell lymphomas, unspecified. There was a radiation dose-response in non-bulky mature T/NK-cell lymphomas, indicating that radiation doses of more than 52 Gy may be required to obtain in-field control. However, it was difficult to obtain local control of bulky T-cell lymphomas, even with high doses of irradiation.
Mature T/NK-cell lymphomas were more radioresistant than B-cell lymphomas such as diffuse large B-cell lymphomas (DLBCL). The chemotherapy including adriamycin did not improve the in-field control of mature T/NK-cell lymphomas. These results were obtained by using non-randomized data and the significance of these results is limited by bias in data. However, our results suggest that the treatment strategy which is usually used for DLBCL, that is, a combined modality of CHOP and around 40 Gy of radiotherapy, may not be sufficiently effective for mature T/NK-cell lymphomas.
Annals of Hematology 06/2014; 94(1). DOI:10.1007/s00277-014-2128-7 · 2.40 Impact Factor
[Show abstract] [Hide abstract]
ABSTRACT: In order to promote widespread adoption of appropriate clinical practice, the Italian Society of Hematology (SIE), and the affiliate societies SIES (Italian Society of Experimental Hematology) and GITMO (Italian Group for Bone Marrow Transplantation) established to produce guidelines in the most relevant hematological areas. Here we report the recommendations for management of T/NK-cell lymphomas, excluding mature T-cell leukemias. By using the GRADE (Grades of Recommendations, Assessment, Development, and Evaluation) system we produced evidence-based recommendations for the key clinical questions that needed to be addressed by a critical appraisal of evidence. The consensus methodology was applied to evidence-orphan issues. Six courses of CHOP or CHOEP chemotherapy were recommended for first-line therapy of patients with nodal, intestinal or hepatosplenic T-cell lymphomas (evidence: low; recommendation: do, weak). Except for ALK+ anaplastic large cell lymphoma and elderly unfit patients, consolidation with high-dose chemotherapy was recommended (evidence: low; recommendation: do, weak). 50 Gy radiotherapy was the recommended first-line therapy for localized extranodal T/NK-cell lymphoma nasal type (evidence: low; recommendation: do, strong), while L-asparaginase containing chemotherapy regimens were recommended for patients with systemic disease (evidence: very low; recommendation: do, strong). In adult T/NK-cell lymphomas, GRADE methodology was applicable to a limited number of key therapeutic issues. For the remaining key issues, due to lack of appraisable evidence, recommendations was based on consensus methodology.Annals of Oncology 04/2014; DOI:10.1093/annonc/mdu152 · 6.58 Impact Factor
[Show abstract] [Hide abstract]
ABSTRACT: Stage III/IV extranodal natural killer/T cell lymphoma (ENKL) has a poor response and poor survival. Given the sensitivity of ENKL to radiotherapy and the fact that there is no consensus on standard chemotherapy, we conducted a clinical trial of LVDP regimen, combining LVDP chemotherapy (containing etoposide, dexamethasone, l-asparaginase, and cisplatin), followed by radiotherapy as a consolidation therapy regimen, for newly diagnosed patients with stage III/IV ENKL to evaluate the efficacy and safety of this regimen. The primary endpoints were overall response rate (ORR) and survival [overall survival (OS) and progression-free survival (PFS)] at 1 or 2 years, while the secondary endpoints were toxicity and adverse effects. In total, 18 patients were enrolled in this trial from July 2010 to September 2013. The mean completed cycles of chemotherapy was 4.04 (range 1–8 cycles), and the ORR was 50 %. During a mean follow-up of 21.8 months (range 2–51 months), the 1-year OS and PFS rates were 72.2 and 50.0 %, respectively, the 2-year OS and PFS rates were 33.3 and 22.2 %, respectively, and the median OS and PFS were 23.0 and 10.5 months, respectively. Severe adverse effects during therapy included six cases of grade 3/4 bone marrow suppression and one case of grade 3 transaminase increase. Sex, eastern cancer oncology group, performance status, Korean Prognostic Index, International Prognostic index, and bone marrow infiltration may influence the prognosis of advanced-stage ENKL.Medical Oncology 02/2015; 32(2). DOI:10.1007/s12032-014-0435-4 · 2.06 Impact Factor