Gastrointestinal Endoscopy Volume 46, Issue 3, Pages (September 1997)

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Endoscopic appearance of amyloidosis with gastrointestinal tract involvement after biopsy Gastrointestinal Endoscopy Volume 46, Issue 3, Pages 284-286 (September 1997) DOI: 10.1016/S0016-5107(97)70104-4 Copyright © 1998 American Society for Gastrointestinal Endoscopy Terms and Conditions

Fig. 1 A, Duodenal mucosa before biopsy. B, Duodenal mucosa after obtaining a biopsy specimen. A fish mouth wound developed soon after the specimen was taken. Gastrointestinal Endoscopy 1997 46, 284-286DOI: (10.1016/S0016-5107(97)70104-4) Copyright © 1998 American Society for Gastrointestinal Endoscopy Terms and Conditions

Fig. 2 The change in rectal mucosa after biopsy specimen was taken. The typical fish mouth wound again developed. Gastrointestinal Endoscopy 1997 46, 284-286DOI: (10.1016/S0016-5107(97)70104-4) Copyright © 1998 American Society for Gastrointestinal Endoscopy Terms and Conditions

Fig. 3 Photomicrographs of the duodenal biopsy. A, Marked hyaline thickening of the media of vessels located in the submucosa. (H&E, original magnification ×100.) The vessel lumen is almost completely obliterated. B, Apple-green birefringence under polarized light. (Congo red stain, original magnification ×100.) Gastrointestinal Endoscopy 1997 46, 284-286DOI: (10.1016/S0016-5107(97)70104-4) Copyright © 1998 American Society for Gastrointestinal Endoscopy Terms and Conditions