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Dermoscopy is a noninvasive technique that improves the diagnostic accuracy for pigmented lesions.¹ Recently, it has also been reported to be of use in the diagnosis of some zoonotic infestations like tungiasis and scabies.^2-3 In the latter, dermoscopy allows the identification of a triangular structure that corresponds to the anterior section of the mite including the mouth part and the 2 pairs of front legs.³ We report a case in which dermoscopy helped to clarify the diagnosis in a papular reaction that mimics scabies.

Report of Case

A 23-year-old white man was seen for a 3-week history of pruritic erythematous papules on his finger webs (Figure 1) and wrists. Previously, he had tried an empirical treatment with topical permethrin for scabies without success. Topical corticosteroids gave little benefit. Dermoscopy of the papules on the fingers revealed several small black spines compatible with spider leg spines (Figure 2). Questioned on . . . [Full Text of this Article]

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AUTHOR INFORMATION
Renato Marchiori Bakos, MD, MSc; Roberto Luiz Rezende, MD; Lucio Bakos, MD, PhD; André Cartell, MD