在颅脑恶性肿瘤中,放疗和辅助化疗在治疗结束后数月到数年中,可能引起迟发改变,报道的发生率为5%~24%。这种与治疗相关的损伤表现多样,可以是脑室周围弥漫性白质损伤到局灶或多发损伤。常规MRI可能难以将治疗相关的损伤与肿瘤发展或复发进行鉴别。两类疾病都具有特征性的血管源性脑水肿 In craniocerebral malignancies, radiotherapy and adjuvant chemotherapy may cause delayed changes from months to years after the end of treatment, with a reported incidence of 5% to 24%. This type of treatment-related injury manifests itself in a variety of forms, including diffuse white matter lesions around the periventricular compartment to focal or multiple lesions. Conventional MRI may have difficulty distinguishing treatment-related injuries from tumor progression or recurrence. Both types of disease have characteristic vasogenic brain edema