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

Figure 2 Imaging features of lesions with and without angle sign on transabdominal ultrasound. A: T4a staging of gastric cancer (GC) lesion with an angle sign, which showed that hypoechoic intrinsic muscular layer protruded outward to form an angle (red arrow); B: T2 staging of GC lesion without an angle sign.