Diagnostic Value of CYFRA 21-1 in the Cerebrospinal Fluid for Leptomeningeal Metastasis

Figure 1

Receiver operating characteristic curves of cerebrospinal fluid (CSF) carcinoembryonic antigen (CEA), serum CEA, and CSF/serum quotient of CEA for differentiating between leptomeningeal metastasis and nonmalignant neurological diseases.