Divided naevus of the penis: two paediatric cases with dermoscopic findings

Abstract

Divided or kissing naevi are located on adjacent parts of the body that are separated during embryogenesis. Divided naevus of the penis (DNP) is exceedingly rare, with < 15 cases reported in the English language literature. Divided penile naevi affect the glans penis and inner foreskin, which are anatomical structures believed to have a common embryological origin. We report the clinical, dermoscopic and histopathological findings of two children with DNP. To our knowledge, this is the first report of patients with DNP seen in South America, and the first in which dermoscopic findings are discussed; these included a large globular pattern in one patient, and homogeneous, streaked and globular patterns in the other.

Divided or kissing nevus of the penis: A new case with dermoscopic findings

“…The dermoscopic findings of four pediatric cases have recently been reported . Two showed the globular pattern that we observed in our case at diagnosis.…”

“…Divided nevi occur only on contiguous parts of the body that are separated during embryologic development . The eyelids are the most frequent location . Only 21 cases of kissing nevus of the penis have been reported to date .…”

“…The risk of malignant transformation of kissing nevus of the penis seems to be low, having been observed in only one case . Therefore, aesthetics and functionality are primary considerations in the management of these patients . Clinical features and benign dermoscopic findings are reassuring and alleviate the need for a biopsy, although the rare possibility of malignant transformation warrants close follow‐up, so we advise clinical and dermoscopic examination every 6 to 12 months—depending on the characteristics of the divided nevus—as is usually done with other congenital nevi …”

“…Multiple patterns and blue or white colors may be observed in more‐advanced lesions . Although no treatment is required if the divided nevus has benign features, surgical excision and reconstruction by skin grafting and laser treatment have been reported but are not routinely recommended …”

“…Divided nevus or kissing nevus is an unusual melanocytic nevus first described on the eyelids. 1 Twenty-one cases of divided nevus of the penis have been reported, and dermoscopic pictures are available in only four. [1][2][3] We report a new case with dermoscopic findings.…”