Endoscopic Detection of Early Esophageal Squamous Cell Carcinoma in Patients with Achalasia: Narrow-Band Imaging versus Lugol's Staining

Table 1

Correlation between endoscopic findings and histopathologic examination by hematoxylin and eosin staining.

Method	Negative endoscopic findings	Positive endoscopic findings	Histopathologic examination
			Squamous cell carcinoma (in situ)	Esophagitis	Normal
Conventional	42	1	1	—	—
Narrow-band imaging	36	7	1	5	1
Lugol’s	34	9	1	8	0