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

Figure 3 Pathological examination with hematoxylin and eosin staining. A: The central portion of an esophagus biopsy sample containing a homogeneous powder and dyed structure (arrows), which is surrounded by inflammatory cells and fibrous tissues (magnification 10 × 4); B: The biopsy sample of ileum containing multiple homogeneous powder dyeing (arrow) without structural small nodules in the submucosal layer (MAGNIFICATION 10 × 4).