title: [Ultrastructural study of chronic gastritis].
abstract: A study of gastric biopsies with optical and electronical microscope from patients with gastritis in different stages of evolution was realized. The ultraestructural results consist in phenomenal alterations at the epitelium level, apparition of bodies of mielinic aspects in the inside of the Oxintcs cells, reduction of the number of this and the peptic cells and even the disappearance of the last. There is an increase of the mucous cells with mitotic changes, notable hyperplasia of the arget cells and intestinal metaplasia in the advanced cases. In the stroma is demonstrative the infiltration of plasmatic cells having a endoplasmatic reticule in different stages of activity, linphocytes and macrophagous full of primary and secondary lysosomas. A very important fact is the increase of the argentofilous cells and its probably relation with the appearing of the gastritis. The presence of the plasma cells and lynphocyts mark the role that takes the immunitary reaction in this process.
mesh_terms: D001706:Biopsy; D002908:Chronic Disease; D004847:Epithelial Cells; D004848:Epithelium / Q000648:ultrastructure; D005753:Gastric Mucosa / Q000648:ultrastructure*; D005756:Gastritis / Q000473:pathology*; D006801:Humans
vernacular_title: Estudio ultraestructural de las gastritis crónicas.