case_images: PMC3271296_01
case_images: Esophagogastroduodenoscopy showing polypoid mass in the duodenal bulb.
case_images: jkms-27-207-g001.jpg
case_images: PMC3271296_01_jkms-27-207-g001.jpg
case_images: F1
case_images: An esophagogastroduodenoscopy revealed a polypoid mass in the duodenal bulb measuring approximately 2 cm (Fig. 1).
case_images: 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).
case_images: jkms-27-207-g002.jpg
case_images: PMC3271296_01_jkms-27-207-g002.jpg
case_images: F2
case_images: 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).
case_images: Abdominal CT showing multiple polypoid mass in the duodenum. There are multiple inhomogeneous polypoid masses in the duodenum (arrowheads).
case_images: jkms-27-207-g003.jpg
case_images: PMC3271296_01_jkms-27-207-g003.jpg
case_images: F3
case_images: The CT scan showed multiple inhomogeneous polypoid masses in the duodenum (Fig. 3).