Résumé
In the study we examined several types of chronic duodenitis, such as, nonspecific, parasitic and those associated to other pathologies, in order to verify the amin histopathological alterations; to correlate endoscopical alterations on light microscopy; to analyze the "white spot" of the duodenal mucosa in parasitic diseases and other types of duodenitis. In 213 endoscopies with 2130 biopsies, we found chronic duodenitis as a difuse process in 91.5 per cent of the cases. Histopathological and morphological correlations show 78.3 per cent "agreement", 18 per cent "false negative" and 3.7 per cent "false positive". However, normal mucosa occured in 86,3 per cent of "false negative"; erosive duodenal pathology was 10.8 per cent of the total cases being classified into: "autonomous" - 26 per cent, "simultaneous" - 9 per cent, portal hypertension - 13 per cent, giardiasis-9 per cent and strongyloidiasis-39 per cent; complete erosions, located in the duodenal bulb, were suggestive of parasitic diseases