[A man with Bowen disease of the nail]. / Een man met splijting van de nagel.

We describe a 40-year-old male patient with a 2-year history of a sensitive fingernail of the right hand. The nail had partly a rough surface, longitudinal cleavage and was brittle and vulnerable at the tip. Biopsy of the nail showed a Bowen disease (squamous cell carcinoma in situ) of the nail.