title: [A case of gastrointestinal AL amyloisosis requiring emergency surgery].
abstract: A 69-year-old man tarry stools received emergency endoscopy. Which revealed a solitary submucosal tumor about 15mm in diameter with a central ulcer, exhibiting woozing bleeding in the duodenal second portion. Endoscopic hemostasis was unsuccessful so emergency surgery was performed. Histological examination revealed amyloid with A-lambda immunoreactivity. Usually, this type of amyloidosis appears multiple submucosal masses. However this case presented as a single nodule at initial examination. We should keep in mind the potential of encountering this atypical form of amyloidosis.
authors.affiliation: Department of Internal Medicine, Nagano Chuo Hospital.
authors.forename: Makiko
authors.initials: M
authors.lastname: Matsumura
authors.forename: Eigo
authors.initials: E
authors.lastname: Kojima
authors.forename: Takehiro
authors.initials: T
authors.lastname: Tajima
authors.forename: Susumu
authors.initials: S
authors.lastname: Tsumahara
authors.forename: Shingo
authors.initials: S
authors.lastname: Ishikuro
mesh_terms: D000368:Aged; D000686:Amyloidosis / Q000601:surgery*; D004378:Duodenal Diseases / Q000601:surgery*; D004630:Emergencies; D006801:Humans; D008297:Male