13.07.2015 Views

Guidelines for Complications of Cancer Treatment Vol VIII Part B

Guidelines for Complications of Cancer Treatment Vol VIII Part B

Guidelines for Complications of Cancer Treatment Vol VIII Part B

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Radiation Induced Central NervousSystem <strong>Complications</strong>IntroductionRadiation therapy (RT) is an important component <strong>of</strong> treatment<strong>of</strong> cancer. However, RT may cause acute and late complicationsas a side effect in a proportion <strong>of</strong> patient. RT inducedcomplications to the central nervous system (CNS) may occurafter treatment <strong>of</strong> primary brain tumour, metastatic braintumour, prophylactic cranial RT (ALL, lymphoma, small celllung cancer) and also after treatment <strong>of</strong> head and neck cancer(temporal lobe necrosis, radiation myelitis).CNS complications after RT are dependent upon several patientand treatment related factors. Toxicity pr<strong>of</strong>ile <strong>of</strong> focal RT isentirely different from cranio-spinal (CSI) or whole brain RT(WBRT). Important late toxicities after RT in brain tumourare mainly neuropsychological, neurological function andneuroendocrine impairment, and also radiation induced secondmalignancy. Apart from these above complications otherrelatively less described ones are cardiovascular accident(CVA), radiation induced necrosis, growth / sexual functionimpairment, radiation induced optic neuropathy (RION),radiation myelitis and skin toxicities (e.g permanent hair loss).344

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