Immunomorphologic features of the ALCL (GEL) carrying the (1;2) translocation. The morphology in a PAS-stained section is typical of the common-type of ALCL, and a hallmark cell,6 with an eccentric horseshoe-shaped nuclei, is arrowed. Staining for CD30 shows typical cytoplasmic and membrane-associated labeling of malignant cells. Labeling for ALK protein (antibody ALK1) is confined to the cell cytoplasm.