Fig. 4
From: Esophageal metastases from primary lung cancer: a case report
Histological and immunohistochemical staining results. a Hematoxylin and eosin (HE) staining of the esophageal lesions (magnification, ×100). The cancer tissue exhibits similar HE morphology as lung adenocarcinoma. Positive immunohistochemical staining (magnification, ×100) for b thyroid transcription factor 1 and c cytokeratin 7, which is the same result as found in the lung adenocarcinoma. d Napsin A of the core biopsy of the esophageal mass shows stippled cytoplasmic positive staining. Napsin A is specific for tumors of lung origin