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  • Title: Total Skin Electron Beam for Primary Cutaneous T-cell Lymphoma.
    Author: Elsayad K, Kriz J, Moustakis C, Scobioala S, Reinartz G, Haverkamp U, Willich N, Weishaupt C, Stadler R, Sunderkötter C, Eich HT.
    Journal: Int J Radiat Oncol Biol Phys; 2015 Dec 01; 93(5):1077-86. PubMed ID: 26581145.
    Abstract:
    PURPOSE: Recent trials with low-dose total skin electron beam (TSEB) therapy demonstrated encouraging results for treating primary cutaneous T-cell lymphoma (PCTCL). In this study, we assessed the feasibility of different radiation doses and estimated survival rates of different pathologic entities and stages. METHODS AND MATERIALS: We retrospectively identified 45 patients with PCTCL undergoing TSEB therapy between 2000 and 2015. Clinical characteristics, treatment outcomes, and toxicity were assessed. RESULTS: A total of 49 courses of TSEB therapy were administered to the 45 patients. There were 26 pathologically confirmed cases of mycosis fungoides (MF) lymphoma, 10 cases of Sézary syndrome (SS), and 9 non-MF/SS PCTCL patients. In the MF patients, the overall response rate (ORR) was 92% (50% complete remission [CR]), 70% ORR in SS patients (50% CR), and 89% ORR in non-MF/SS patients (78% CR). The ORR for MF/SS patients treated with conventional dose (30-36 Gy) regimens was 92% (63% CR) and 75% (25% CR) for low-dose (<30-Gy) regimens (P=.09). In MF patients, the overall survival (OS) was 77 months with conventional dose regimens versus 14 months with low-dose regimens (P=.553). In SS patients, the median OS was 48 versus 16 months (P=.219), respectively. Median event-free survival (EFS) for MF in conventional dose patients versus low-dose patients was 15 versus 8 months, respectively (P=.264) and 19 versus 3 months for SS patients (P=.457). Low-dose regimens had shorter treatment time (P=.009) and lower grade 2 adverse events (P=.043). A second TSEB course was administered in 4 MF patients with 100% ORR. There is a possible prognostic impact of supplemental/boost radiation (P<.001); adjuvant treatment (P<.001) and radiation tolerability (P=.021) were detected. CONCLUSIONS: TSEB therapy is an efficacious treatment modality in the treatment of several forms of cutaneous T-cell lymphoma. There is a nonsignificant trend to higher and longer clinical benefit for MF and SS patients receiving conventional dose. Low-dose TSEB regimens are well tolerated and achieve short-term palliation.
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