Clin Dermatol 2021 Dec 31. Epub 2021 Dec 31.
Department of Dermatology and Allergy, Technische Universität München, Munich, Germany. Electronic address:
Annular configuration is conspicuous in the clinical manifestation of many skin diseases and can be helpful for the diagnosis and differential diagnosis. Variations may include arciform, ring-form, annular, circinate, serpiginous, gyrated, polycyclic, targeted or figurate forms, in different colors, sizes, and numbers, with various textures and surfaces. In infectious dermatoses, the annular reactions can be specific or nonspecific, while the underlying mechanisms remain largely unknown. Read More