Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology
-
To analyze the recurrence patterns in patients with newly diagnosed glioblastoma (GBM) treated with conformal radiotherapy (RT) plus concomitant and adjuvant temozolomide (TMZ), and to compare the patterns of failure according to different target volume delineations. ⋯ Most of patients treated with RT plus concomitant and adjuvant RT have central recurrences, however distant new lesions may occur in more than 10% of patients. The use of target delineation using postoperative residual tumor and cavity plus 2-cm margins is associated with smaller volumes of normal brain irradiated to high doses as compared with plans including expanded edema, without a significant increase of the risk of marginal recurrences. Future clinical randomized studies need to compare the different planning methods in terms of efficacy and risk of late radiation-induced toxicity.
-
The value of palliative radiotherapy (PRT) for bone metastases is well established, but little is known about its use in the general population. ⋯ Access to PRT appears to be inequitable. More effort is required to make this useful treatment available to all those who would benefit from it.
-
To examine the association of polymorphisms in ATM (codon 158), GSTP1 (codon 105), SOD2 (codon 16), TGFB1 (position -509), XPD (codon 751), and XRCC1 (codon 399) with fibrosis and also individual radiosensitivity. ⋯ It is most likely that risk for radiation-induced fibrosis can be assessed by a combination of risk alleles. This finding needs to be replicated in further studies.
-
The potential benefits of positron emission tomography (PET) imaging for the management of head and neck tumours are increasingly being recognized. Integrated PET-CT has found its way into the practice of radiation oncology providing both functional and anatomical tumour information for treatment planning and the implications for clinical practice are currently being investigated. ⋯ Finally, PET can provide tumour characterization prior to and during radiotherapy, facilitating adaptive radiotherapy and other tailored treatment strategies. Although these are promising prospects, unresolved issues remain and these applications are not yet ready for introduction into routine clinical practice.
-
The present chapter is focused on the role of positron emission tomography/computed tomography (PET/CT) and [11C]-labelled Choline ([11C]Choline) for the management of prostate cancer patients for radiation therapy planning. Although still a matter of debate, PET/CT with [11C]Choline is not routinely recommended for selecting patients for prostate cancer primary radiation treatment. ⋯ According to available literature, [11C]Choline PET/CT is not clinically recommendable to plan target volume both for primary prostate treatment and for local recurrence. Nevertheless, promising data suggested a potential role of [11C]Choline PET/CT as an image guide tool for the irradiation of prostate cancer relapse.