Retrospective Study
Copyright ©The Author(s) 2022.
World J Gastrointest Surg. Sep 27, 2022; 14(9): 986-996
Published online Sep 27, 2022. doi: 10.4240/wjgs.v14.i9.986
Figure 1
Figure 1 A typical case of carcinoma in situ. A: ME-BLI image shows micro-vessels with a loop-like formation (type B1); B: Ultrasonography image shows hypoechoic thickening confined to the first two layers; C: Hematoxylin-eosin staining (× 40) of an endoscopic resection specimen shows that the squamous cell carcinoma is limited to the epithelium, without invasion.