A, B: Plaque-like psoriasis of the scalp with characteristic silvery, thick scale distinguishes it from seborrheic dermatitis of the scalp. (Used, with permission, from S Goldstein.) Source: Dermatologic Disorders, Current Medical Diagnosis & Treatment 2017 Citation: Papadakis MA, McPhee SJ, Rabow MW. Current Medical Diagnosis & Treatment 2017; 2016 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/1843/cmdt17_ch6_ef023b.png&sec=135698763&BookID=1843&ChapterSecID=135698605&imagename= Accessed: November 11, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved