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  • Title: Salivary Gland Epithelial-Myoepithelial Carcinoma with High-Grade Transformation in a Dog.
    Author: Kishimoto TE, Yoshimura H, Saito N, Michishita M, Kanno N, Ohkusu-Tsukada K, Takahashi K.
    Journal: J Comp Pathol; 2015; 153(2-3):111-5. PubMed ID: 26223938.
    Abstract:
    An 8-year-old male neutered standard dachshund was presented with a slowly growing mass in the left submandibular salivary gland. Histopathological examination revealed a tumour that was composed of bilayered duct-like structures with an inner layer of ductal cells and an outer layer of clear cells. Both inner and outer cells in the greater part of the tumour exhibited low to moderate atypia and low mitotic activity. However, a focal area towards the periphery showed enhanced cellular atypia and mitotic activity in tumour cells. Immunohistochemically, the outer layer of clear cells expressed myoepithelial markers, while the inner layer cells were positive for a luminal epithelial marker. No local recurrence or lymph node or distant metastasis was observed 18 months following surgery. Based on the morphology and immunohistochemical findings, a final diagnosis of epithelial-myoepithelial carcinoma with high-grade transformation was made.
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