Ann Dermatol.  2011 Nov;23(4):512-514.

Kissing Nevus of the Penis

• Yun SJ
• Wi HS
• Lee JB
• Kim SJ
• Won YH
• Lee SC

Abstract

Kissing or divided nevi are similar in shape to congenital melanocytic nevi located on an adjacent part of the body that are separated during embryogenesis. Kissing nevi of the upper and lower eyelids have been reported infrequently since the first report in 1908. Kissing nevi of the penis are very rare, with only 12 cases being reported until now, and this is the first case report in the Korean dermatological literature. A previously healthy 27-year-old man presented with asymptomatic black colored patches, which were detected 10 years ago, on the glans penis and the prepuce with growth in size. We report here a case of kissing nevus of the penis, which showed an obvious mirror-image symmetry relative to the coronal sulcus.

Keyword

Nevus; Pigmented

MeSH Terms

Adult
Embryonic Development
Eyelids
Female
Humans
Male
Nevus
Nevus, Pigmented
Penis
Pregnancy

Figure

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  Fig. 1 Kissing nevi of the penis. Black colored patches on the glans and the prepuce laterally.

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  Fig. 2 Histopathological examination of the brown-black pigmented patches on the glans penis (A, B). Nests of nevus cells are present at the dermal-epidermal junction and upper dermis (H&E, A: ×40, B: ×200). Immunohistochemical staining for HMB45 (C) and melan A (D). Nevus cells show partial and strong reactivity to HMB45 and melan A, respectively (C, D: the glans penis, ×100). Histopathological findings and immunohistochemical staining of a specimen from the prepuce reveal similar features.

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