[Prevalence of Helicobacter pylori in gastric pathology in Aragon]. / Prevalencia del Helicobacter pylori en patología gástrica en Aragón.

The aim of this study was to evaluate the prevalence of Helicobacter pylori in 400 patients referred for upper digestive tract endoscopy. In our area it hasn't developed yet any epidemiologic study about this disease. Helicobacter pylori was observed in 281 of the 400 patients studied (70%). No significant differences by sex were found in the subjects analyzed. There was a rise in the percentage of positivities as age increased. Helicobacter pylori were positive in 74 of the 88 patients with chronic superficial gastritis (84.1%), in 53 of the 65 with chronic atrophic gastritis (81.5%), in 16 of the 25 with chronic atrophic gastritis and intestinal metaplasia (64%), in 49 of the 63 with gastric ulcer (77.8%), in 73 of the 85 with duodenal ulcer (85.9%), in 9 of the 24 patients with gastric carcinoma (37.5%), in 5 of the 19 with stump gastritis (26.3%), where as only a few Helicobacter pylori were found in 2 of the 31 histologically normal subjects (6.5%). These findings support the wiew that Helicobacter pylori may be etiologically related to chronic gastritis and peptic ulceration, even though their precise role still remains to be determined.

[Preneoplastic lesions associated with carcinoma of the stomach: retrospective study of 125 gastrectomy pieces]. / Lesiones preneoplásicas asociadas a carcinomas gástricos: estudio retrospectivo en 125 piezas de gastrectomía.

A study was made of 125 gastrectomy pieces with gastric carcinoma in which metaplastic and dysplastic changes on the intact gastric mucosa adjacent to the tumor were analyzed. Both incomplete intestinal metaplasia and different types of dysplasia were more frequently and significantly associated with carcinomas of intestinal pattern than with diffuse ones (p less than 0.001). Jass type I dysplasia was more frequent in well-differentiated carcinomas, while Jass type II was more common in relatively undifferentiated tumors, the difference being highly significant (p less than 0.001). Our results and those of other studies in the literature suggest a pathogenic relationship only between preneoplastic lesions and gastric carcinoma of intestinal pattern, which probably includes entities that can be differentiated by pathogenesis to judge from the variations in the dysplastic changes observed.