Figure 6.
Immunohistochemical stain for cytokeratin AE1/3 demonstrates cytokeratin-negative tumor infiltrating among cytokeratin-positive native renal tubules (avidin-biotin-peroxidase; original magnification, ×160).
Immunohistochemical stain for cytokeratin AE1/3 demonstrates cytokeratin-negative tumor infiltrating among cytokeratin-positive native renal tubules (avidin-biotin-peroxidase; original magnification, ×160).