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Cutaneous lymphangioma circumscriptum (CLC) is clinically characterized by clusters of translucent vesicles that may be filled by blood.To evaluate the dermoscopic features of CLC.Dermoscopic examination was performed in two cases presenting with discrete translucent and blood-tinged lesions.Lesions filled with clear fluid were dermoscopically characterized by light brown lacunas surrounded by paler septa. Lesions tinged with blood were associated with different dermoscopic features depending on the amount of blood content: focal reddish areas inside the lagoons, pink diffuse coloration, reddish to violaceous lacunar structures.On dermoscopy, CLC was characterized by a lacunar pattern. Lesions with a marked hematic content show dermoscopic findings indistinguishable from those of hemangioma.

Radiation therapy can cause acute and chronic damage of the skin.A 71-year-old woman presented with an atrophic and sclerotic plaque at a site previously treated with radiotherapy because of lung cancer. Inside the area affected by chronic radiodermatitis, she reported that a preexisting pigmentary lesion had gradually undergone morphologic changes after radiation therapy.On dermoscopy, the lesion showed features highly suspicious for malignant melanoma. The lesion was excised and examined histopathologically.The histopathologic diagnosis was compound congenital melanocytic nevus associated with prominent dermal sclerosis and epidermal atrophy.The existence of melanocytes within an atrophic and fibrotic area is a finding typically associated with recurrent or persistent melanocytic lesions. It is likely that the "pseudomelanoma" features of the lesion observed in our patient might have been secondary to the skin changes induced by radiation therapy.

Background. Regression of congenital melanocytic nevi is usually accompanied by the halo phenomenon and is considered a rare event. Objective. A 15-year-old woman presented for the evaluation of multiple halo nevi. She had on her trunk a figure-of-eight pigmentary lesion, which had been developed after the coalescence of two distinct congenital melanocytic nevi. Close to the indentation between the two portions of the lesion, there was an achromic rounded area, extending from the perinevic skin to the nevus, causing its partial regression. Methods and Materials. Dermoscopic examination disclosed a globular and homogeneous pattern, which was irregularly present at the edge of the achromic area. The histopathologic diagnosis was compound congenital melanocytic nevus with an eccentric area of regression. Conclusions. In our case, the presence of a regression area in the surrounding skin and the association with multiple halo nevi suggest a similarity with halo phenomenon, despite the atypical “halo,” which was discontinuous and eccentric. NICOLA ARPAIA, MD, NICOLETTA CASSANO, MD, RAFFAELE FILOTICO, MD, FRANCESCO LARICCHIA, MD, AND GINO ANTONIO VENA, MD, HAVE INDICATED NO SIGNIFICANT INTEREST WITH COMMERCIAL SUPPORTERS.