Figure 2

Representative results of p53 immunohistochemistry in malignant PCC. (a) Primary tumor of a malignant PCC (case 6) not showing nuclear overexpression of p53 protein (score 0). (b) Malignant PCC (case 7) showing the corresponding metastasis of the primary tumor shown in (a) with positive nuclear immunostaining for p53 (score 6).