Value of endoscopic methylene blue and Lugol's iodine double staining and detection of GST-Π and telomerase in the early diagnosis of esophageal carcinoma

Table 4 Telomerase activity expression in esophageal carcinogenesis (n, %)

Histology	n	Telomerase activity expression		Positive numberof telomerase (%)
		+	-
Normal epithelium	53	25	1	2 (3.8)
Hyperplasia	21	1	20	1 (4.8)1
Dysplasia	79	41	28	41 (51.9)a
Carcinoma	55	49	6	49 (89.1)c

¹P = 0.998, hyperplasia vs normal epithelium;

^aP<0.005, χ² = 33.45, dysplasia vs normal epithelium;

^cP<0.005, χ² = 78.83, carcinoma vs normal epithelium.