Dermpedia

Sharing dermatology and dermatopathology knowledge

Halo nevi are so called because they clinically surrounded surrounded by a white halo.  They tend to occur in children and younger adults and, as in this case, are most common on the trunk.

Histologically, one sees a dense lichenoid infiltrate of lymphocytes and histiocytes, which may obscure the nevus cell nests, potentially causing them to be missed if they are not carefully sought.  Immunohistochemical stains may aid in their detection.

Halo nevi may be junctional, compound or dermal.