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European Journal of Dermatology

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Extensive speckled lentiginous nevus associated with giant congenital melanocytic nevus: an unusual example of twin spotting? Volume 13, issue 6, November - December 2003

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Authors
Department of Dermatology and Pathology, Hospital del Niño Jesús, Menéndez Pelayo 65, 28009‐Madrid, Spain Department of Dermatology, University of Marburg, Deutschhaustrasse 9, 35033 Marburg, Germany

A 15‐year‐old boy had an unusual combination of giant congenital melanocytic nevus on his back and a large speckled lentiginous nevus arranged in a checkerboard pattern on the dorsal and lateral aspects of his trunk. The two pigmentary nevi showed distinguishing features both clinically and histopathologically. The speckled lentiginous nevus was not noted at birth but became visible during childhood. We hypothesize that this uncommon co‐occurrence may represent a further example of twin spotting and may be categorized as a new, distinct type of phacomatosis.