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Figure 3: (a) Endobronchial biopsy shows a carcinoma infiltrating in the subepithelium and ulcerating the overlying metaplastic bronchial mucosa (arrows). (b) The tumor is arranged in variable-sized nests separated by delicate vasculature. (c) Tumor cells show diffuse nuclear staining for anti-estrogen receptor antibody. (d) Tumor cells do not stain for the anti-thyroid transcription factor antibody. (e) Tumor cells show diffuse staining for GATA3 which was performed later after the discovery of a primary breast mass

Figure 3: (a) Endobronchial biopsy shows a carcinoma infiltrating in the subepithelium and ulcerating the overlying metaplastic bronchial mucosa (arrows). (b) The tumor is arranged in variable-sized nests separated by delicate vasculature. (c) Tumor cells show diffuse nuclear staining for anti-estrogen receptor antibody. (d) Tumor cells do not stain for the anti-thyroid transcription factor antibody. (e) Tumor cells show diffuse staining for GATA3 which was performed later after the discovery of a primary breast mass