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Acrokeratoelastoidosis of the Foot with Clinical, Dermoscopic, Ultrasonographic, and Histopathologic Correlation

Pablo Uribe Department of Dermatology, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.

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Elena Ortiz Department of Dermatology, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.

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Ximena Wortsman Department of Radiology and Department of Dermatology, Institute for Diagnostic Imaging and Research of the Skin and Soft Tissues, Clinica Servet, Faculty of Medicine, University of Chile, Santiago, Chile. Dr. Wortsman is now with the Institute for Diagnostic Imaging and Research of the Skin and Soft Tissues, Santiago, Chile, and the Department of Dermatology, Faculty of Medicine, Pontificia Universidad Católica, de Chile.

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Sergio Gonzalez Department of Pathology, Faculty of Medicine, Pontificia Universidad Católica de Chile.

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Acrokeratoelastoidosis (AKE) is a rare form of focal acral keratoderma of unknown cause that typically begins during childhood and manifests with multiple, small, hyperkeratotic papules located over the lateral margins of the hands and feet. The purpose of this article is to report a pediatric case of AKE with dermoscopic, sonographic, and histopathologic descriptions, contributing to the awareness of this clinical diagnosis. We describe a 7-year-old girl with nonpainful yellowish papules on the lateral and medial aspects of both feet. Dermoscopy showed yellowish, structureless, linear areas. The sonographic appearance was suggestive of benignancy and ruled out the presence of piezogenic pedal papules and granulomas. Histopathology was consistent with AKE, showing acral skin with hyperorthokeratosis, hypergranulosis, and elastorrhexis in the reticular dermis. Acrokeratoelastoidosis may be difficult to recognize clinically because of its resemblance to other focal acral keratodermas. Color Doppler ultrasound can be a useful noninvasive tool for diagnosis and can confirm its benign appearance, although histopathology confirms the definitive diagnosis. To date, the dermoscopic description and ultrasound morphology of AKE have not been reported.

Corresponding author: Pablo Uribe, PhD, Pontificia Universidad Católica de Chile, Dermatology, 4686 Vicuña Mackenna, Santiago 7820436, Chile. (E-mail: puribeg@med.puc.cl)
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