Figure 4.

Immunohistochemical features of the metastatic papillary thyroid carcinoma and primary lung adenocarcinoma. Napsin A was positive in primary lung adenocarcinoma (▲), but negative in metastatic papillary thyroid carcinoma (→) (a, b and c). Thyroglobulin was positive in metastatic papillary thyroid carcinoma (→), but negative in primary lung adenocarcinoma (▲) (d, e and f).