“…Furthermore, patients with erosive duo denitis unrelated to duodenal ulcer showed a very poor endoscopic response to powerful acid-inhibiting treatment with ranitidine, whereas good results were observed with pirenzepine, an antimuscarinic agent with only a weak antisecretory activity but exerting cytoprotective effects [40], This supports the view that in autonomous erosive duodenitis acid secretion is generally normal [41] and that -contrary to what happens in duodenal ulcer -gastric acid plays a minor role in the pathogenesis of this disorder [42], It seems reasonable to conclude that non specific duodenitis, either moderate or ero sive, can indeed represent a focal reaction to duodenal ulcer ('satellite duodenitis')-On the other hand, duodenitis can occur as an autonomous, ulcer-independent disorder, the pathogenesis of which, although still ob scure, appears not to be related to acid hy persecretion. The autonomous type of ero sive duodenitis accounts for 46-68% of duo denal erosions detectable at upper gastroin testinal endoscopy [43].…”