*Columbia University Vagelos College of Physicians and Surgeons, New York, NY;

†Department of Pathology, Weill Cornell Medical Center, New York, NY; and

‡Department of Dermatology, Columbia University Irving Medical Center, New York, NY.

Correspondence: Larisa J. Geskin, MD, Columbia University Irving Medical Center, Department of Dermatology, 161 Fort Washington Ave, 12th Floor, New York, NY 10032 (e-mail: [email protected])

Written informed consent was obtained from the patient for publication of this case report and accompanying images.

C. Chen, L.M. Fahmy, C.M. Schreidah, C.M. Magro, and L.J. Geskin have given substantial contributions to the conception and design of the manuscript. C. Chen and L.M. Fahmy conducted chart review and literature review and prepared the original draft of the manuscript. C.M. Magro analyzed the histopathology slides and provided the included photomicrographs. L.J. Geskin provided direct care in the diagnosis and treatment of the patient. All authors contributed to the review and editing of the manuscript. All authors read and approved the final version of the manuscript. L.J. Geskin has served as an investigator for and/or received research support from Helsinn Group, J&J, Mallinckrodt, Kyowa Kirin, Soligenix, Innate, Merck, BMS, and Stratpharma; is on the speakers' bureau for Helsinn Group and J&J; and is on the scientific advisory board for Helsinn Group, J&J, Mallinckrodt, Sanofi, Regeneron, and Kyowa Kirin. C. Chen, L.M. Fahmy, C.M. Schreidah, and C.M. Magro have no conflicts of interest to declare.