Dermoscopy is an aiding method in the visualization of the epidermis and dermis. It
is usually used to diagnose melanocytic lesions. In recent years, dermoscopy has
increasingly been used to diagnose non-melanocytic lesions. Certain vascular
structures, their patterns of arrangement and additional criteria may demonstrate
lesion-specific characteristics. In this review, vascular structures and their
arrangements are discussed separately in the light of conflicting views and an
overview of recent literature.