[Cystic dilatation of the choledochus]

The authors show a case of cystic dilatation of choledochus in a woman patient aged 10. After reporting its nosologic classification, drawn from the world literature, they dissert about the treatment, which should be essentially surgical. The Authors performed a new surgical technique, as an alternative to the suggestion of other Authors. The method adopted consists of the partial resection of the cyst and subsequent reconstruction of choledochus on Kohr's tube.