
In the context of the ongoing development of targeted therapies, new RT indications may evolve.ĭiffuse large B‑cell lymphoma (DLBCL) is the most common aggressive non-Hodgkin lymphoma (NHL), constituting 31% of all NHL. With the use of PET-guided treatment, RT is indicated for patients with metabolically active tumors. RT remains an integral part of the treatment repertoire of DLBCL. Additionally, RT may be used in the treatment context of various subtypes of DLBCL as well as in the recurrent or refractory treatment situation. Conformal techniques shall be used for target volume coverage, with a risk–benefit evaluation for the individual patient. For RT planning, PET information before and after immunochemotherapy shall be used, with either a PET-CT in the RT treatment position or an image fusion to the planning CT. RT shall be administered to all patients with localized positron emission tomography(PET)-positive residues after completion of immunochemotherapy and should use a dose of 30–40 Gray in normofractionation. Additional literature is presented to provide a comprehensive background for the published recommendations. The following article reviews the evidence and recommendations given in the current German evidence-based guideline on DLBCL regarding RT and summarizes pivotal aspects. The publication of the national evidence-based guideline on DLBCL prompted us to review relevant passages on radiation oncology.

However, there are conflicting data on the role and impact of consolidative radiation therapy (RT). Diffuse large B‑cell lymphoma (DLBCL) is an aggressive lymphoma subtype treated successfully with immunochemotherapy.
