E-cadherin and alpha-SMA expression in the epithelial-mesenchymal transition of salivary glands pleomorphic adenomas
Vol. 55 No. 4, 2014
ROMANIAN JOURNAL of MORPHOLOGY and EMBRYOLOGY
Aurelia Enescu, Anca Stefania Enescu, Charoula Florou, Florin Petrescu
The pleomorphic adenoma, known also as mixed tumor of epithelioma with reshuffling stroma, is the most frequent salivary gland tumor, representing 45-75% of the total salivary gland tumors. In our study, we have investigated the immunohistochemical expression of E-cadherin and alpha-smooth muscle actin (alpha-SMA) in 15 cases of pleomorphic adenoma of salivary glands. We noticed the constant presence of E-cadherin reactivity at the level of luminal cells that cover the proliferative structures of ductal-cystic type, which gradually disappears to the periphery. At the level of epithelial proliferative solid areas, the reactivity for E-cadherin was inconstant and heterogeneous, while alpha-SMA expression increased. This aspect indicated the involving of epithelial-mesenchymal transition process in the evolution of pleomorphic adenoma.
Corresponding author: Marioara Dobre, MD, PhD Student; e-mail: mary2dobre@yahoo.com
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