Clinical characteristics and transabdominal ultrasound features that associated with T3-T4 staging in gastric cancer: A retrospective study

Figure 4 The manifestations of T4a staging lesion on transabdominal ultrasound, gross specimen, and pathological section. A: An angle sign on ultrasound showed the significantly thickened gastric wall (red arrow) and serrated structure (red dotted line) in the gastric angle; B: Gross specimen showed the serrated structure (red dotted line) in the gastric angle; C: Pathological section (× 400) showed that tumor cells invaded the serosa, which was T4a staging.