Usefulness of endoscopic ultrasonography in preoperative TNM staging of gastric cancer

Figure 1 Early and advanced gastric cancer cases. A: Endoscopic view of superficial depressed type of early gastric cancer; B: EUS image shows cancer invasion of 1^st and 2^nd (mucosal) layers of gastric wall, while 3^rd (submucosal) layer is clear (T1 category). Histopathological findings of the surgically resected specimen corresponded with the EUS findings; C: Endoscopic view of advanced Borrmann II type of gastric cancer; D: EUS images show disruption of 1-4 layers of the gastric wall with hypoechoic cancer tissue, but 5^th (serosal) layer is not involved (T2 category).

Figure 2 A case of advanced gastric cancer. A: Endoscopic view of Borrmann III type of gastric cancer; B: EUS image demonstrates T3 cancer with malignant lymph node. Note the hypoechoic structure and sharp margin of the lymph node (1.0 cm×0.6 cm).