[Geographic lip and folded lip. A new association].

Abstract

In a typical case of geographical lip, the authors discovered the presence of parallel vertical grooves on the mucosal side of the lips and believe these are similar to those observed in folded tongue. They concluded that there is a possible association "geographical lip and folded lip", comparable with the association "geographical tongue and folded tongue". They then carried out a histological study and proposed an etiopathogenic explanation for the folds in the lip in comparison with the fissures of the tongue, dysembryoplasia due to heterotopy of the gustatory or lymphopoietic grooves.