A 75-year-old man consulted for a pigmented lesion on his right ear. This lesion was located on helix.
Dermoscopy revealed a light brown structureless area with some brown dots arranged in lines in the periphery.
Focal arrangement of brown dots in lines (red arrows) is clearly seen on the dermoscopic picture above.
A biopsy was performed and revealed a Bowen's disease.
This arrangement of brown dots in lines has been recently reported in the Journal of American Academy of Dermatology * by H. Kittler and al. It is typical of pigmented Bowen's disease.
*A Cameron, C. Rosendahl, P. Tschandl, E. Riedl, H. Kittler. Dermatoscopy of pigmented Bowen's disease. J Am Acad Dermatol 2010; 62: 597-604.