Breast metastasis from primary lung adenocarcinoma in a young woman: A case report and literature review

Figure 3 Breast biopsy showed adenocarcinoma infiltrating into the adjacent parenchyma. A: Ducts were not involved by the tumor, and no evidence of in situ carcinoma was obtained (x 40); B: Bronchoscopy biopsy (HE) showed poorly differentiated adenocarcinoma (x 40); C, D: Immunohistochemical staining for thyroid transcription factor-1 was positive on both breast (C) and lung specimens (D); E, F: GATA3 staining was negative in both breast (E) and lung tissue (F).