Neoplastic meningitis(NM),a disease of leptomeningeal metastasis from malignant tumors,is difficult to diagnose and has a poor prognosis.

• 脑(脊)膜转移瘤(NM)是在临床上常常被误诊、漏诊的恶性肿瘤软脑(脊)膜转移的疾患,治疗效果差,死亡率高,生存期短。