TWO CASES OF TYPE AA AMYLOIDOSIS WHICH WERE CONSIDERED AS LOCALIZED TO THE UPPER DIGESTIVE TRACT

Abstract

Two cases of type AA asymptomatic intestinal amyloidosis were found on the medical examination. A case of them showed not only coarse mucosa but also multiple protruded lesion simulating submucosal tumor which were atypical as type AA and showing similar features to type AL endoscopically, at the 2nd portion of the duodenum. The other case showed fine granular mucosa which was clarified by the contrast method on the greater curvature of the stomach endoscopically. Though they were diagnosed as type AA amyloidosis histologically on the biopsy specimen, they were regarded as primary because they had no basic disease. Furthermore, they were also considered as localized to the upper digestive tract, although deposit of type AA amyloid protein is usually systemic.