Clinical and pathological features and treatment of nine cases of gastrointestinal composite gangliocytoma/neuroma and neuroendocrine tumor

Figure 2 Endoscopic image and endoscopic ultrasonography image of composite gangliocytoma/neuroma and neuroendocrine tumor (A and B in the duodenum, C and D in the rectum). A: White light endoscopy reveals a smooth-surfaced submucosal protrusion in the descending part of the duodenum, adjacent to the orifice of the major duodenal papilla; B: Endoscopic ultrasonography reveals a hypoechoic lesion arising from the muscularis propria (arrow), with heterogeneous internal echoes and a maximum cross-sectional dimension of approximately 1.64 cm × 1.54 cm. C: White light endoscopy reveals a submucosal protrusion with erythematous surface at 10 cm from the anal verge in the rectum; D: Endoscopic ultrasonography reveals a moderate to low echoic mass arising from the deep mucosa with submucosal involvement, well-defined borders, a measured cross-sectional dimension of approximately 1.35 cm × 0.91 cm, and an intact muscularis propria and adventitia.