A Nodular Lesion of the Foot Detected by 18F-FDG PET/CT in Mycosis Fungoides: A Plantar Wart

A 34-year-old Japanese woman presented with widespread scaly erythema that had enlarged over 2 years. A skin biopsy revealed the diagnosis of mycosis fungoides (patch stage, T1b N0 M0 B0), a most frequent cutaneous T-cell lymphoma. 18F-FDG PET/CT scan unexpectedly showed intense uptake on the left sole, which suggested a tumorous mycosis fungoides lesion (SUVmax = 6.2). Careful examination revealed the mass to be a typical plantar wart of 2 cm in diameter that the patient had not recognized. With repeated cryotherapy, the wart disappeared in 6 months, and follow-up 18F-FDG PET/CT showed no abnormal uptake on the left sole. Received for publication September 11, 2018; revision accepted November 5, 2018. Conflicts of interest and sources of funding: none declared. Correspondence to: Yasuyuki Fujita, MD, PhD, Department of Dermatology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, North 15 West 7, Sapporo 060-8638, Japan. E-mail: yfujita@med.hokudai.ac.jp. Copyright © 2018 Wolters Kluwer Health, Inc. All rights reserved.

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