Transabdominal ultrasonography in preoperative staging of gastric cancer

Figure 4 Differentiation between benign and metastatic lymph nodes. A: Benign lymph nodes. Sonogram shows multiple small lymph nodes (arrow) adjacent to the lesser curvature of stomach (STO). These hypoechoic lymph nodes are 5-8 mm, and misdiagnosed as metastatic with transabdominal US; Pathologic examination confirms that all theses lymph nodes are reactive and noncancerous. B: Metastatic lymph nodes. Sonogram is similar to figure A. Multiple hypoechoic small lymph nodes (arrow) adjacent to the lesser curvature of stomach (STO) are 5-9 mm, and confirmed metastatic by pathologic examination.