TDO-II demonstrates more pronounced nail dystrophy (either with laminated
splitting of the superficial layers or thick cornification), sparse, curly
hair, and thickening and sclerosis of the calvaria. Males may show narrowing
of the ear canal. In contrast to TDO-I, not only is dental eruption
precocious, but also, in addition to the enamel hypoplasia, the dentin is
dysplastic.