<Tr> <Td> Leukoedema </Td> </Tr> <Tr> <Td> Pachyonychia congenita </Td> </Tr> <Tr> <Td> Dyskeratosis congenita </Td> </Tr> <Tr> <Td> Tylosis </Td> </Tr>

Thick white patch of cells in the oral cavity that may be precancerous