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

Table 2

CSF/serum quotient of CEA and CYFRA 21-1 in patients with leptomeningeal metastasis and patients with nonmalignant neurological diseases.

Patients	CSF/serum; quotient	Minimum	25% percentile	Median	75% percentile	Maximum
LM	CEA	0.03	0.36	0.96	3.20	31.88	0.00
	CYFRA 21-1	0.03	1.33	2.81	10.20	350.15
NMNDs	CEA	0.04	0.10	0.13	0.30	0.44	0.00
	CYFRA 21-1	0.10	0.30	0.39	0.57	1.19

LM: leptomeningeal metastasis, NMNDs: nonmalignant neurological diseases.