PT - JOURNAL ARTICLE AU - Michael Kosmin AU - Jeremy Rees TI - Radiation and the nervous system AID - 10.1136/pn-2022-003343 DP - 2022 Dec 01 TA - Practical Neurology PG - 450--460 VI - 22 IP - 6 4099 - http://pn.bmj.com/content/22/6/450.short 4100 - http://pn.bmj.com/content/22/6/450.full SO - Pract Neurol2022 Dec 01; 22 AB - Radiation therapy is widely used for benign and malignant brain tumours as it is effective and well tolerated. However, damage to the surrounding healthy nervous system tissue leads to a variety of complications both in the short term and long term, ranging from mild and self-limiting to irreversible and fatal. Radiation neurotoxicity is due to a combination of early inflammation and oligodendroglial damage followed later by brain tissue necrosis, white matter damage, accelerated vascular disease and the development of secondary tumours. This article explains the basic principles of radiation physics, the different modalities used in clinical practice, how radiotherapy is planned and delivered and the scientific basis of radiation damage. The main body of the article focuses on the clinical features of radiation toxicity in the brain, spinal cord, cranial and peripheral nerves with an emphasis on the distinction between early and delayed complications.No data are available.