A 70-year-old woman with hypertension and dyslipidemia presented with slow communication and difficulty walking 90 days after 6 courses of postoperative chemotherapy following right breast cancer surgery. What is your diagnosis?

中文翻译：

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沟通缓慢、行走困难的患者


一名患有高血压和血脂异常的70岁女性，在右乳腺癌术后接受6个疗程的术后化疗后90天出现沟通缓慢和行走困难。您的诊断是什么？