NCIt definition : A rare autosomal dominant disorder with high penetrance that affects the limbal conjunctiva
or oral mucosa. It is almost exclusively encountered in Native Americans belonging
to the Haliwa-Saponi tribe of northeastern North Carolina and is caused by a duplication
in chromosome 4q35. It is characterized by the presence of elevated epithelial dyskeratotic
plaques in the limbal conjunctiva or oral cavity. Epithelial dysplasia is absent.;