Periungual Bowen's disease in a 4-year-old girl.
Bowen's disease (BD), or cutaneous squamous cell carcinoma (SCC) in situ, is rare in children. BD usually occurs in Caucasian adults on sun-exposed areas and may progress to invasive cutaneous SCC. Most cases of periungual BD have been linked to human papillomavirus infection. We report an immunocompetent child with periungual BD.