Self-healing hyperkeratosis of the nail bed.

Abstract

Here is reported a strange case of hyperkeratosis of the nail, arisen immediately after birth according to the mother, in a 5-year-old boy. The differential diagnosis, the recent classification of congenital pachyonichia and the new diagnostic criteria required for its diagnosis are discussed. However, the surprising end of the story, although happy for the child health, does not favor our diagnostic ability.