PMC9086487_01
Post-operative photo indicating the patient's breast mass position (arrow and circle) as well as the previous incision for lung cancer (arrow).
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F1
The patient rejected breast-conserving surgery, therefore, mastectomy with SLNB (sentinel lymph node biopsy) was performed (Figure 1).
Computed tomography scan showing the primary lung tumor (arrow).
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F2
Computed tomography (CT) revealed a lump in the superior lobe of the right lung (Figure 2) and adenocarcinoma of the lung was diagnosed through the 18-G conventional core needle biopsy (Biopty, Bard, Covington, GA, USA).
Expression of TTF-1 (A) and napsin A (B) indicating the breast lump was a metastasis from a lung primary cancer.
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F3
The results of immunohistochemistry (IHC) staining were positive for Napsin A, TTF-1 (Figure 3), and CK7 and negative for p40, Syn.