Kissing nevus of the penis: a case report and dermatoscopic findings

Abstract

Divided nevus, also known as kissing nevus, is a rare variant of congenital melanocytic nevi in which there are two adjacent nevi in areas of the body that undergo embryonic cleavage. The original description of this type of lesion was on the eyelid. The location on the penis is even rarer, with only 17 case reports in the literature so far, and only one of them described the dermoscopic findings. We report the case of a patient with divided nevus of the penis and its clinical, dermoscopic and histopathological features.

Figure 1

A, B, C: Brown macules on the lateral aspect of the glans and prepuce of the penis, almost symmetrical on both sides of the coronal sulcus

Figure 2

Dermoscopy of the macules revealed melanocytic lesions in a compound pattern. In the periphery, there was fine pigment network and in the center, dark globules of different sizes. A: lesion on the glans; B: lesion on the prepuce

Figure 3

Photomicroscopy of the glans skin. A: Proliferation of densely pigmented melanocytes along the dermal-epidermal junction and papillary dermis (Hematoxylin & eosin, X100); B: Proliferation of densely pigmented melanocytes along the dermal-epidermal junction and forming nests in the papillary dermis (Hematoxylin & eosin, X400); C: Melanocytes with evident nuclei (arrows) (Hematoxylin & eosin, X400)