Case report and review of the literature of primary gastrointestinal amyloidosis diagnosed with enteroscopy and endoscopic ultrasonography

Figure 2 Images of endoscopic ultrasonography. A: Nodular protuberances in the esophagus stemming from hypoechoic lesions of the submucosa, and the layer of origin was clear; B: Nodular protuberances in the colon stemming from the submucosa, partially invading the intrinsic myometrium with a hypoechoic structure, which is partially hypoechoic fusion and inhomogeneous echo.