Actinic keratoses after 4 weeks of treatment with 5-fluorouracil cream Actinic keratoses after 4 weeks of treatment with 5-fluorouracil cream. Typical response to treatment with erythema, crust, and erosions in treated areas on the face. Source: Actinic Keratosis, Basal, and Squamous Cell Carcinoma, Clinical Dermatology Citation: Soutor C, Hordinsky MK. Clinical Dermatology; 2017 Available at: http://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/2184/soutor_ch17_f002.png&sec=165460338&BookID=2184&ChapterSecID=165460313&imagename= Accessed: November 09, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved