Endoscopic and histopathological features of gastrointestinal amyloidosis

Figure 1 Endoscopic view of amyloid light chains amyloidosis in a 64-year-old man without multiple myeloma presenting abdominal fullness. A: Characteristic multiple yellowish-white polypoid protrusions and thickening of the folds in the descending duodenum are presented; B: Biopsy specimens showed marked homogenous eosinophilic deposition in the mucosae and submucosa (HE, × 40); C: Congo red stain confirmed a unique “apple-green” birefringence of the amyloid deposition under polarized light (× 40). All figures and legends are reproduced from[8] with permission from Elsevier.