A halo nevus had exceptional clinical features. Present at the same time were a central nevus, a halo of depigmentation around the nevus, and patches of pigment that had recently returned to the depigmented halo. To my knowledge, this variation in pattern has not been previously emphasized.
Report of Case
A 30-year-old woman sought advice because of the "changing behavior" around a mole on the posterior aspect of her right shoulder. Eighteen months previously, this mole became surrounded by a ring of depigmentation. When "brown spots" appeared in the previously completely depigmented ring, friends alerted her to "the possibility of skin cancer." The nevus in the center of the depigmented halo was globoid and lightly pigmented. Patches of pigment were scattered irregularly within the halo (Fig 1).
The specimen showed a circumscribed collection of nevus cells in the dermis (Fig 2). Superficially, these cells were epithelioid; deeply they were
Berman A. Halo Nevus With Exceptional Clinical FeaturesApparent Arrest of Nevus Cell Degeneration and Return of Pigment to Halo. Arch Dermatol. 1978;114(7):1081-1082. doi:10.1001/archderm.1978.01640190065024