TY - CHAP M1 - Book, Section TI - Lichen Sclerosus A1 - Dooley-Hash, Suzanne A1 - Knoop, Kevin J. A2 - Knoop, Kevin J. A2 - Stack, Lawrence B. A2 - Storrow, Alan B. A2 - Thurman, R. Jason Y1 - 2021 N1 - T2 - The Atlas of Emergency Medicine, 5e AB - Lichen sclerosus (LS) is a benign, chronic, inflammatory condition of unclear etiology that results in epithelial atrophy or hyperplasia, and scarring. The condition typically occurs in the anogenital region (85%-98%), but can develop on any skin surface. Female-to-male ratio is 10:1 with onset often perimenopausal. It occurs more frequently in women in low-estrogen states with autoimmune conditions such as diabetes mellitus type 1, vitiligo, and thyroid disorders. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/04/19 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181041612 ER -