PMC7649587_01
A red tumor on the left axilla with a size of 1.0 cm.
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There were no palpable axillary nodes (Fig. 1).
Histopathology of the axillary tumor. The tumor is located in the dermis and formed by cells with eosinophil granular cytoplasm (a). There is Alcian blue-positive mucus in the lumina (b). The tumor cells showed positive staining for cytokeratin 7 (c), gross cystic disease fluid protein 15 (d), and GATA-binding protein 3 (e) and negative staining for estrogen receptor (f).
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The tumor cells stained positive for cytokeratin 7, gross cystic disease fluid protein 15 (GCDFP15), and GATA-binding protein 3 and negatively for the estrogen receptor (ER) (Fig. 2).
Axilla ultrasonography showing a homogeneous hypoechoic mass measuring 8.8 x 7.4 x 8.6 mm.
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A hypervascular round tumor projecting from the skin was identified by ultrasonography on her left axilla (Fig. 3).