Endoscopic and histopathological features of gastrointestinal amyloidosis

Figure 2 Endoscopic views of amyloid A amyloidosis in a 45-year-old woman with rheumatoid arthritis. A: A round ulcer surrounded by longitudinal reddish mucosa is presented in the gastric antrum. Histopathological examination confirmed amyloid deposition; B: Fine granular mucosa in the descending duodenum; C: Biopsy of the duodenal lesion showing marked amorphous eosinophilic deposition in the lamina propria mucosae (HE, × 100); D: Congo red staining showing amyloid deposition (× 100).