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Dermoscopy of a Plantar Combined Blue Nevus: A Simulator of Melanoma

Panasiti V.a · Devirgiliis V.a · Borroni R.G.a · Mancini M.a · Rossi M.a · Curzio M.a · Mastrecchia B.a · Bottoni U.b · Innocenzi D.a · Calvieri S.a
aDepartment of Dermatology, University of Rome ‘La Sapienza’, Rome, and bDepartment of Dermatology and Oncology, University of Catanzaro ‘Magna Graecia’, Catanzaro, Italy Dermatology 2007;214:174–176 (DOI:10.1159/000098579)

Abstract

Dermoscopy allows early detection of melanoma also on acral volar skin. The majority of melanocytic nevi on palms and soles may show three major dermoscopic patterns: the parallel-furrow pattern, the lattice-like pattern, and the fibrillar pattern. Melanomas at these sites are characterized by the parallel ridge pattern. We present the case of a 59-year-old woman who had an oval papule of bluish color, measuring 0.6 × 0.9 cm, localized on her left sole, that had been present, unchanged, for more than 10 years. Dermoscopy showed a parallel ridge pattern. The histopathological examination revealed a combined blue nevus. We present this case to underline that on acral volar skin also intradermal nevi, such as combined blue nevi, may dermoscopically exhibit a parallel ridge pattern, simulating melanoma.

 

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