PMC3271296_01
Esophagogastroduodenoscopy showing polypoid mass in the duodenal bulb.
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F1
An esophagogastroduodenoscopy revealed a polypoid mass in the duodenal bulb measuring approximately 2 cm (Fig. 1).
Histopathology of duodenal mucosa. (A) Deposition of pale pink amorphous materials and infiltration of plasma cells in the lamina propria (H&E stain, x 400). (B) Negative reaction on Congo red staining (x 400). (C) Positive reaction in plasma cells with anti-kappa light chain antibodies (IHC stain, x 400). (D) Negative reaction with anti-lambda light chain antibodies (IHC stain, x 400).
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F2
An endoscopic biopsy from the mass showed a deposition of pink, amorphous material and infiltration of plasma cells in the lamina propria (Fig. 2A). Congo red staining was negative (Fig. 2B). A few plasma cells showed lambda light chain (LC) immunohistochemical staining (Fig. 2C), although most plasma cells were kappa light chain-positive (Fig. 2D).
Abdominal CT showing multiple polypoid mass in the duodenum. There are multiple inhomogeneous polypoid masses in the duodenum (arrowheads).
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F3
The CT scan showed multiple inhomogeneous polypoid masses in the duodenum (Fig. 3).