RT Book, Section A1 Ahn, Christine S. A1 Huang, William W. A2 Kang, Sewon A2 Amagai, Masayuki A2 Bruckner, Anna L. A2 Enk, Alexander H. A2 Margolis, David J. A2 McMichael, Amy J. A2 Orringer, Jeffrey S. SR Print(0) ID 1161330406 T1 Erythema Annulare Centrifugum and Other Figurate Erythemas T2 Fitzpatrick's Dermatology, 9e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9780071837798 LK dermatology.mhmedical.com/content.aspx?aid=1161330406 RD 2024/10/11 AB AT-A-GLANCEUncommon inflammatory hypersensitivity reaction characterized by annular or polycyclic plaques with central clearing and peripheral scale.Favors the extremities and trunk.Chronic condition that recurs and remits.Two histologic variants: superficial variant consists of spongiosis, parakeratosis, hyperkeratosis or basal vacuolar changes with a perivascular infiltrate, and deep variant consists of perivascular lymphocytic infiltrate concentrated in the upper dermis without any epidermal changes.Treatments include topical corticosteroids, vitamin D analogs, antibiotics, and antifungals.