- Or a suspicion of dysplasia epithelial (compatible clinical History(Story) with or without extra-digestive demonstrations(appearances) of type keratinate punctuated superficial (KPS), abnormalities cutanea or atresia CHOANS with atypical digestive histology and without diagnosis known in the family). The objectives are the diagnosis on the basis of the immuno-histochemistry expression and the existence of an infringement(achievement) conjunctival and the phenotypic characterization of the case