CD1A and trichoblastoma: The (i) cytoarchitectural compartmentalization of the tumor nests, with basaloidperipheral cells and loosely arranged pale, glycogen-rich central cells,observable from low magnification; (ii) the lymphoid cell infiltration; and (iii)the presence of scattered S100 and CD1a-positive dendritic cells, are highlycharacteristic and distinctive of adamantinoid trichoblastoma, which seldom posesproblems in terms of differential diagnosis.