Two patients had multiple, somewhat pruritic papulosquamous lesions on the trunk and proximal extremities, almost exclusively involving nevi. Histologically, these lesions showed pigmented nevi with overlying parakeratosis, focal spongiosis, acanthosis, and a lymphocytic perivascular infiltrate in the dermis. The lesions resolved under topical steroid therapy, with the nevi persisting unchanged. A similar disorder has not been noted in the literature.
Meyerson LB. A Peculiar Papulosquamous Eruption Involving Pigmented Nevi. Arch Dermatol. 1971;103(5):510-512. doi:10.1001/archderm.1971.04000170044011