Gastric amyloidoma in patient after remission of Non-Hodgkin’s Lymphoma

Figure 1 CAT scan of the abdomen revealed thickening and calcification of the gastric wall with associated pneumatosis, as well as a 1 cm pedunculated mass in the proximal duodenum.

Figure 2 On esophagogastroduodenoscopy, a non bleeding 3 cm polyp was noted in the post-bulbar area of the duodenum.

Figure 3 Under light microscopy, gastric biopsy appears salmon-colored when stained with Congo Red.

Figure 4 PET scan revealed diffuse gastric mucosa uptake compatible with gastric malignancy but no hypermetabolic neoplastic foci elsewhere.