Bowen's disease is a malignant condition (technically, it is an intraepidermal squamous cell carcinoma). Early lesions may resemble fungal infections, dermatitis, or psoriasis. The diagnosis is made by biopsy (examining a tissue sample).
Review Date 8/14/2021
Updated by: Elika Hoss, MD, Senior Associate Consultant, Mayo Clinic, Scottsdale, AZ. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. Editorial update 04/14/2022.