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Figure 1 | BMC Cancer

Figure 1

From: Diagnosis and staging of superficial esophageal precursor based on pre-endoscopic resection system comparable to endoscopic resection

Figure 1

Endoscopic images for the USL grade to diagnose the lesions. The normal staining: Normal mucosa is negative after staining, and some very weak staining suggests esophagitis (a). The USL is weak and the margin of the USL is indistinct, defined as the grade III, which is usually the mild dysplasia (b). The USL is weak while the margin clear, defined as grade II, which is usually moderate dysplasia (c). The USL is distinct with the margin clear, defined as grade I, with or without protrude or depressed lesions, which is usually the severe dysplasia (Tis) or T1 (d).

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