Figure 1

Papillary carcinoma: (a) H&E stain, (b) Pax8, (c) TTF-1, (d) TTF-2. Follicular carcinoma: (e) H&E stain, (f) Pax8, (g) TTF-1, (h) TTF-2. Poorly differentiated carcinoma: (i) H&E stain, (j) Pax8, (k) TTF-1, (l) TTF-2. Anaplastic carcinoma: (m) H&E stain, (n) Pax8, (o) TTF-1, (p) TTF-2. Medullary carcinoma: (q) H&E stain, (r) Pax8, (s) TTF-1, (t) TTF-2.