Amyloidosis of the stomach. Report of a case with ultrastructure

The author reports on a rare case of local amyloidosis (amyloid tumour) of the stomach. The first electron-microscopic study of such case was performed by her. She observed a large number of microfilaments in the mucus producing cells of the stomach mucosa, and assumed this to be indicative of a pathologic mucus secretion. The epithelial cells involved also changes indicating the disorder of protein secretion. She treats in detail the electron-microscopic characteristics of cellular elements found in amyloid. The closest relationship to amyloid deposits was shown by myofibroblasts. They probably play an important role in the formation of local amyloid.