Proliferation of endocrine-like enterochromaffin) cells in atrophic gastri mucosa.
D000752:Anemia, Pernicious / Q000473:pathology; D002838:Chromaffin System / Q000473:pathology*; D005753:Gastric Mucosa / Q000473:pathology*; D006801:Humans; D008854:Microscopy, Electron