This condition was first described by A. Heimler and coworkers in 1991 and only a few families have been reported since then.
The primary teeth are apparently normal but secondary teeth have defective enamel (outer coating). Hearing loss of the sensorineural type develops in the first 3 years of life. Vision loss has been noted in a single patient during the 3rd decade and detailed studies revealed changes in the retina. The nails develop ridges and white spots. Psychomotor development seems to be normal.
This is a familial disorder but no specific gene mutation has been found. The family pattern suggests autosomal recessive inheritance since both sexes are affected and no parent-to-child transmission has been seen. The parents who likely carry a single mutation are clinically normal. Such parents would have a 25% risk of having another child with the disorder.
The diagnosis depends upon dental and hearing evaluations as well as examination of the nails and the eye. The prognosis is excellent but low vision and hearing assistance devices should be of benefit.