Speckled lentiginous nevus: understanding the process of development and regression

Speckled lentiginous nevus (SLN) is characterized by a brownish macule studded with blackish, multiple melanocytic nevi, although the cutaneous manifestations may vary by cases, and change by age. Therefore, there has been disagreement as to whether SLN is a congenital or acquired disease 1, 2). In rare cases of SLN, halo phenomenon may occur around the pre-existing lesion, associated with the coexistence of distant vitiligo 3). Here, we report a patient whose café-au-lait spot at birth changed to SLN, followed by the occurrence of vitiligo and poliosis through the process of spontaneous regression phenomenon against the SLN. We examined T-cell clones infiltrating around the melanocytic nevi and in the patient's peripheral blood.

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