[Digestive duplications affecting the pharynx or fistulae of the fourth endo-branchial pouch. Four cases (author's transl)].

Four cases of children with recurrent latero-cervical epithelial cystic tumours which where identified as exceptional derivatives of the 4th endobranchial pouch on the basis of their connections with the pharynx and in particular the piriform fossa. The opportunity is taken to review the characteristics of equally rare digestive, duplications and congenital diverticula at a cervical and buccopharyngeal level. This diagnosis was made initially in the first of these cases.