Table 3.

Relationship between PTEN expression and clinicopathologic characteristics of 20 patients with ESCC

Variables	Total	PTEN expression
		Low	High	P value
Gender
Male	13	8	5	0.491
Female	7	2	5
Age (years)
< 60	4	3	1	0.173
> 60	16	7	9
Tumor diameter (cm)
< 3	3	1	2	0.020*
> 3	17	9	8
T stage
T1 + T2	8	3	5	0.004**
T3 + T4	12	7	5
Lymph node metastasis
N−	10	4	6	0.017*
N+	10	6	4
TNM stage
I + II	11	4	7	0.032*
III + IV	9	6	3