Pathological evaluation of gastrointestinal endoscopic submucosal dissection materials based on Japanese guidelines

Figure 4 Evaluation of vessel invasion and lymphatic invasion. Venous invasion is evaluated by using a double staining with Victoria blue and hematoxylin-eosin (A) and immunohistochemistry of desmin (B). Lymphatic invasion is demonstrated by immunostaining of D2-40 (C). Lymphatic invasion is noted in the lamina propria (D: Hematoxylin-eosin stain; E: Immunohistochemistry of D2-40).