Contribution to the anterior seromyotomy and posterior truncal vagotomy in the treatment of chronic duodenal ulcer. The authors report a technique of anterior seromyotomy of the gastric lesser curvature with posterior truncal vagotomy for the surgical treatment of chronic duodenal ulcer disease. This technique offers more advantages than the highly selective vagotomy: it is an easier operation to perform, less time consuming and reproducible. Our results are similar to those following highly selective vagotomy.