Figure 1.
A. MSCT-T1 tumor: Transverse CT image shows an elevated lesion (arrow) of the gastric mucosa of the lesser curvature with a clear fat plane. The elevated gastric mucosa shows strong enhancement, and the tumor is confined to the mucosa.
B. MSCT-T2 tumor: Transverse CT image shows an elevated lesion (arrow) of the gastric mucosa of the lesser curvature with a clear fat plane. The elevated gastric mucosa shows strong enhancement, and the tumor is considered as the invasion into the muscular layer but not the serosa.
C. MSCT-T3 tumor: Transverse CT image shows a markedly thickened gastric wall (arrow) of the lesser curvature. The tumor extends beyond the serosal layer and affects the fat plane. Its relation with adjacent organs can be distinguished.
D. MSCT-T4 tumor: Transverse CT image of a transmural tumor of the gastric antrum (arrow) with a markedly thickened gastric wall and invasion of the head of the pancreas.
E. EUS-T1 cancer: Endosonographic image of T1 gastric cancer showing hypoechogenic wall thickening with infiltration of the mucosal and submucosal layers (arrow).
F. EUS-T2 cancer: Gastric carcinoma with infiltration of the muscularis propria (arrow).
G. EUS-T3 cancer: Transmural hypoechoic tumor with penetration into serosa (arrow).
H. EUS-T4 cancer: EUS showing advanced gastric cancer with infiltration of the head of the pancreas (arrow).
Figure 2.
A. MSCT- Lymph node metastases: Transverse CT image of two enlarged lymph nodes (arrows) near the left gastric artery, which shows strong enhancement on enhanced scanning and areas of necrosis in the nodes.
B. EUS- Lymph node metastases: EUS showing two hypoechoic lymph nodes (arrows), the largest of which is 16.2×14.3 mm.