TY - CHAP M1 - Book, Section TI - Onychomycosis A1 - Hardin, J. Matthew 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 - Onychomycosis is an invasion of the nails by any fungus. Four clinical subtypes are described. Distal subungual presents as discolorations of the free edge of the nail with hyperkeratosis, leading to subungual accumulation of friable keratinaceous debris. White superficial consists of sharply outlined white areas on the nail plate, which leave the surface friable. Proximal subungual presents as discolorations that start proximally at the nail fold. Candidal onychomycosis encompasses the entire nail plate, leaving the surface rough and friable. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/04/18 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181044103 ER -