Although the pattern at th is magnification might be characterized as having nevocytic qualities, there are deviations. Condensed fibrous tissue outlines each fascicle in this area. Below this zone, small pale cells form smaller, more closely spaced fascicles. There are variations, but the pattern basically is expansile. The patterns do not correspond to those of a common nevus.
Fascicular patterns are better represented near the dermal-epidermal interface.
The cells are pale and spindle shaped. In clusters, the cells provide an epithelioid quality. The cells form loosely spaced fascicles in a fibrotic, widened papillary dermis and are not associated with significant lymphoid infiltrates. In the lower portion of the field, the fascicles are smaller and more closely spaced. The continuity of nests of cells in the epidermis with the dermal component would identify the overall pattern as having a primary configuration, once the dermal component has been identified as a vertical growth component.