Fig. 3From: Successful multimodal treatment of intraoral salivary duct carcinoma in a patient with multiple lymph node metastases: a case reportImmunohistochemical staining for androgen receptor, cytokeratin 7, gross cystic disease fluid protein-15 (GCDFP-15), and human epithelial growth factor receptor 2 (HER2)/neu. The tumor cells were immunoreactive for a androgen receptor and b cytokeratin 7 and focally immunoreactive for c GCDFP-15 but were not immunoreactive for (d) HER2/neuBack to article page