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

Figure 1 Endoscopic view of esophageal wall after MB and Lugol’s iodine double staining. A: Before staining, a large broad-based erosion was observed on esophageal wall and the outlines of erosion were unclearly discernible; B: after MB staining, the same lesion stained more deeper blue than surrounding mucosa; C: after Lugol’s iodine double staining, the normal mucosa appeared brown, the same lesion stained more deeper blue than surrounding mucosa and the areas between both the colors were not stained.