During the last 100 years, since Cesar Roux (1857-1934) began utilizing his "Loop-en-Y" procedure for gastric outlet obstruction, this technique fell into disfavour but later, with the vagotomy, it was adapted for multiple applications. The greatest factor in its revival has been the treatment of postgastrectomy sequels, including alkaline reflux gastritis, reflux esophagitis, dumping and other syndromes. Additionally Roux-en-Y anastomosis has been used to drain diverse organs as the biliary tract, pancreas and esophagus. The main complication of loop-en-Y is the Roux syndrome, secondary to gastric or efferent jejunal stasis, or both. As the centennial of Roux's first use of his eponymic procedure approaches its seems appropriated to remind its memory as a part of our surgical inheritance.