Table 1 . Distribution of variables in 30 cases of ESCC by cyclin D1 status .

		Total number (n= 30)	Cyclin D1 negative (n= 4)	Cyclin D1 positive (n= 26)	p value
Tumor size (cm)	≤ 3 cm	15	1 (6.7%)	14 (93.3%)	0.597
	> 3 cm	15	3 (20%)	12 (80%)
Tumor site	Upper 1/3rd (C15.3)	0	0	0	0.522
	Middle 1/3rd (C15.4)	12	1 (8.3%)	11 (91.7%)
	Lower 1/3rd (C15.5)	15	2 (13.3%)	13 (86.7%)
	Overlapping lesion (C15.8)	3	1 (33.3%)	2 (66.7%)
Tumor invasion to adventitia	No	13	2 (15.4%)	11 (84.6%)	1.000
	Yes	17	2 (11.8%)	15 (88.2%)
Lymph node metastasis	Absent	14	2 (14.3%)	12 (85.7%)	1.000
	Present	16	2 (12.5%)	14 (87.5%)
Histologic type of tumor	Well differentiated(G1)	2	1 (50%)	1 (50%)	0.246
	Moderately differentiated(G2)	14	2 (14.3%)	12 (85.7%)
	Poorly differentiated(G3)	14	1 (7.1%)	13 (92.9%)