PMC5340653_01
Endoscopy of the duodenum showing blunted villi.
CG-CGCR160161F001.jpg
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F1
Esophagogastroduodenoscopy identified gastric mucosal atrophy and blunted villi in the duodenum (Figure 1).
Duodenal mucosal biopsy showing (A) eosinophilic material within vessel walls and (B) Congo red birefringence highlighting the eosinophilic material.
CG-CGCR160161F002.jpg
PMC5340653_01_CG-CGCR160161F002.jpg
F2
The eosinophilic material stained positive with Congo red (Figure 2).