Re-irradiation with protons or heavy ions with focus on head and neck, skull base and brain malignancies

Br J Radiol. 2020 Mar;93(1107):20190516. doi: 10.1259/bjr.20190516. Epub 2019 Nov 12.

Abstract

Re-irradiation can offer a potentially curative solution in case of progression after initial therapy; however, a second course of radiotherapy can be associated with an increased risk of severe side-effects. Particle therapy with protons and especially carbon ions spares surrounding tissue better than most photon techniques, thus it is of high potential for re-irradiation. Irradiation of tumors of the brain, head and neck and skull base involves several delicate risk organs, e.g. optic system, brainstem, salivary gland or swallowing muscles. Adequate local control rates with tolerable side-effects have been described for several tumors of these locations as meningioma, adenoid cystic carcinoma, chordoma or chondrosarcoma and head and neck tumors. High life time doses nonetheless lead to a different scope of side-effects, e.g. an enhanced rate of carotid blow outs has been reported. This review summarizes the current data on particle irradiation of the aforementioned locations and malignancies.

Publication types

  • Review

MeSH terms

  • Brain Neoplasms / radiotherapy*
  • Carcinoma, Adenoid Cystic / radiotherapy
  • Carotid Arteries / radiation effects
  • Carotid Artery Injuries / etiology
  • Central Nervous System / pathology
  • Central Nervous System / radiation effects
  • Chondrosarcoma / radiotherapy
  • Chordoma / radiotherapy
  • Ependymoma / radiotherapy
  • Glioma / radiotherapy
  • Head and Neck Neoplasms / radiotherapy*
  • Heavy Ion Radiotherapy / methods*
  • Humans
  • Meningeal Neoplasms / radiotherapy
  • Meningioma / radiotherapy
  • Necrosis
  • Organs at Risk
  • Proton Therapy / methods*
  • Re-Irradiation / methods*
  • Sarcoma / radiotherapy
  • Skull Base Neoplasms / radiotherapy*