Diagnostic procedures for submucosal tumors in the gastrointestinal tract

Figure 1 Endoscopic ultrasonography imagines of normal wall and submucosal tumors of the large intestine are presented. A: The normal wall displayed in 5 layers; B: Lipoma imagine showing a hyperechoic homogeneous mass located in the third layer; C: Leiomyoma imagine showing a hypoechoic homogeneous mass originated from the 4^th layer; D: Rectal carcinoid imagine showing a submucosal hypoechoic mass with a homogenous echo. Courtesy by PH Zhou (Zhou, 2004 128 /id).