“…Especially, in many hospitals of Europe and North America, this procedure is carried out as an adjunct to choledocholithotomy, and excellent results have been reported [6,8]. On the other hand, in Japan this operation has also been performed when sim ilar operative procedures were indicated [5,9], But, many people have been critical of this procedure because a blind pouch in the lower region of the choledochus is formed by this operation, and there is a possibility for the occurrence of ascending cholangitis, the sump syn drome, recurrent bile duct stones and pancreatitis [1,3,4], In fact, many investigators, including the authors, have experienced such complications caused by side-toside choledochoduodenostomy.…”