FIGURE 4. Volume of disease in sentinel nodes demonstrating cytoplasmic or membranous staining in morphologically malignant cells. A, isolated tumor cell. B and C, isolated tumor cells. D, tumor cell clusters, 0.10 mm in size. E, micrometastasis 0.57 mm in size. F, macrometastasis (>2 mm in size) on H&E stained section of SLN.