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Low-dose radiotherapy in diffuse large B-cell lymphoma.

Carlo Furlan1, Vincenzo Canzonieri2, Michele Spina3

  • 1Department of Radiation Oncology, Centro di Riferimento Oncologico (CRO), National Cancer Institute, Aviano, Italy.

Hematological Oncology
|October 27, 2016
PubMed
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Low-dose radiotherapy (LDRT) effectively palliates diffuse large B-cell lymphoma (DLBCL). This study found LDRT achieved a 70% response rate and improved quality of life in DLBCL patients, indicating its therapeutic potential.

Area of Science:

  • Oncology
  • Radiation Oncology
  • Hematology

Background:

  • Low-dose radiotherapy (LDRT) is established for indolent lymphomas.
  • Limited data exists on LDRT for diffuse large B-cell lymphoma (DLBCL).

Purpose of the Study:

  • To evaluate the efficacy and safety of LDRT for palliative treatment in DLBCL patients.
  • To assess clinical response, quality of life, and prognostic factors in DLBCL patients receiving LDRT.

Main Methods:

  • A phase 2 trial administered LDRT (2 x 2 Gy) to symptomatic areas in DLBCL patients.
  • Clinical response was defined as >50% reduction in lesion diameter at 21 days.
  • Quality of life was assessed using the EORTC QLQ-C30 questionnaire. Tumor subtype and TP53 mutations were analyzed.
Keywords:
DLBCLTP53low-dose radiotherapypalliationquality of life

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Main Results:

  • The overall response rate was 70% (16/23 patients), with a mean response duration of 6 months.
  • Quality of life improved in 9 of 15 evaluable patients.
  • Germinal center B-cell type DLBCL showed a significantly better response rate (83%) than activated B-cell type (29%) (P=0.01). TP53 mutations were more frequent in non-responders.

Conclusions:

  • LDRT is an effective palliative treatment option for patients with DLBCL.
  • Tumor subtype influences response to LDRT in DLBCL.
  • LDRT demonstrates a favorable safety profile and improves quality of life in this patient population.