Histologic features of tumor of the follicular infundibulum

Tumor of the follicular infundibulum has a horizontal orientation to the tumor that parallels the epidermis. Keratinocytes with pale pink cytoplasm that contrast sharply with the darker pink epidermal keratinocytes descend from and reconnect with the undersurface of the epidermis. Small cyst and duct-like structures are focally present (H&E 40x).