The Serum Concentrations of Chemokine CXCL12 and Its Specific Receptor CXCR4 in Patients with Esophageal Cancer

Table 1

Characteristics of esophageal cancer patients.

Variable tested		Number of patients
Group	Esophageal cancer	49
Gender	Male	41
	Female	8
Type of cancer	Adenocarcinoma	24
	Planoepitheliale	25
TNM stage ()	I + IIa + IIb	10
	III	32
	IV	7
Depth of tumor invasion (T factor)	T1 + T2	8
	T3	29
	T4	12
Nodal involvement (N factor)	N0	11
	N1	38
Distant metastases (M factor)	M0	42
	M1	7
Differentiation of tumor	Well differentiated—G1	14
	Moderately differentiated—G2	18
	Undifferentiated—G3	17
Resection	R0—microscopically complete	23
	Other	26
Survival of patients	Died of cancer	22
	Alive	27