A. Acne conglobata in a 16-year-old boy A. Acne conglobata in a 16-year-old boy. He has severe cysts on his face with sinus tracks between them. He required many weeks of oral prednisone before isotretinoin was started. His acne cleared completely with his treatment. B. Acne conglobata cleared with minimal scarring after oral prednisone and 5 months of isotretinoin therapy. (Courtesy of Richard P. Usatine, MD.) Source: Chapter 112. Acne Vulgaris, The Color Atlas of Family Medicine, 2e Citation: Usatine RP, Smith MA, Chumley HS, Mayeaux EJ, Jr.. The Color Atlas of Family Medicine, 2e; 2013 Available at: http://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/usat2/usat2_c112f007b.png&sec=45366861&BookID=685&ChapterSecID=45361168&imagename= Accessed: January 23, 2018 Copyright © 2018 McGraw-Hill Education. All rights reserved