title: A case of localized amyloid light-chain amyloidosis in the small intestine.
abstract: Amyloidosis is characterized by the abnormal deposition of extracellular amyloid fibrils. Cases involving amyloid light-chain amyloidosis in the small intestine have been reported infrequently in Korea. Here, we report a case of localized light chain protein amyloidosis in the small intestine. Esophagogastroduodenoscopy, push enteroscopy, and capsule endoscopy revealed submucosal tumor-like lesions, multiple shallow ulcers, and several erosions in the distal duodenum and jejunum. An endoscopic biopsy established the diagnosis of amyloidosis. In through an immunohistochemical analysis, the presence of lambda light chain protein was detected. The patient had no evidence of an underlying clonal plasma cell disorder or additional organ involvement. Therefore, we concluded that the patient had localized amyloidosis of the small intestine.
authors.affiliation: Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea.
authors.forename: Jong Hyo
authors.initials: JH
authors.lastname: Choi
authors.affiliation: Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea.
authors.forename: Bong Min
authors.initials: BM
authors.lastname: Ko
authors.affiliation: Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea.
authors.forename: Cheol
authors.initials: C
authors.lastname: Kim
authors.affiliation: Digestive Disease Center and Research Institute, Department of Pathology, Soonchunhyang University College of Medicine, Bucheon, Korea.
authors.forename: Hee Kyung
authors.initials: HK
authors.lastname: Kim
authors.affiliation: Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea.
authors.forename: Jae Pil
authors.initials: JP
authors.lastname: Han
authors.affiliation: Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea.
authors.forename: Su Jin
authors.initials: SJ
authors.lastname: Hong
authors.affiliation: Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea.
authors.forename: Jong Ho
authors.initials: JH
authors.lastname: Moon
authors.affiliation: Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea.
authors.forename: Moon Sung
authors.initials: MS
authors.lastname: Lee
keywords: Amyloidosis; Capsule endoscopy; Endosonography; Enteroscopy; Intestine, small