RT Book, Section A1 Dooley-Hash, Suzanne A1 Knoop, Kevin J. A2 Knoop, Kevin J. A2 Stack, Lawrence B. A2 Storrow, Alan B. A2 Thurman, R. Jason SR Print(0) ID 1181041624 T1 Lichen Planus T2 The Atlas of Emergency Medicine, 5e YR 2021 FD 2021 PB McGraw-Hill PP New York, NY SN 9781260134940 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1181041624 RD 2024/09/19 AB Lichen planus is a recurrent inflammatory condition that can affect any area of skin, mucosa, nails, and scalp. Although the etiology is unknown, it is often associated with autoimmune diseases suggesting an autoimmune cause.