(A, B) Upon presentation large, scaly, annular plaques with well-defined, erythematous, raised ... (A, B) Upon presentation large, scaly, annular plaques with well-defined, erythematous, raised borders coalescing to produce polycyclic arrays were noted on the patient’s upper and lower back as well as on both arms. (C, D) After 8 weeks of treatment with dapsone (50 mg/day for the first month and subsequently 100 mg/day) the rash disappeared, leaving only a mild peripheral hyperpigmentation with central depigmentation in the affected areas. Unless provided in the caption above, the following copyright applies to the content of this slide: © The Author(s) 2019. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved. For permissions, please email: journals.permissions@oup.comThis article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) Rheumatology (Oxford), Volume 58, Issue 5, 04 January 2019, Pages 920–921, https://doi.org/10.1093/rheumatology/key434 The content of this slide may be subject to copyright: please see the slide notes for details.