The area to the left of the center of the field in fig. 2 is represented. In the region of the yellow arrows, the cells forming rounded nests at the dermal-epidermal interface and in the papillary dermis show moderate atypia but the nests are not associated with markers for host immune response. In the region of the green arrows, a dermal component of common nevus cells is represented. The zone of nevus-like cells in sheets is represented to the left of the green arrows.
Yellow arrows outline a column of disparate nevus cells in continuity with the epidermis.
The column outlined by yellow arrows is composed of atypical cells and is in continuity with the epidermis. The nevus cells forming nests and fascicles to the right of the field are cytologically bland. They have the qualities of the cells of a common nevus. In the area outlined by yellow arrows, the cells have more abundant cytoplasm and show some loss of nuclear polarity. Focally, a few lymphocytes are sprinkled among the nevus cells to the right, and among the more atypical cells forming the nest outlined by yellow arrows.