The majority of salivary glands tumors are benign mixed tumors. The present study was aimed to evaluate the differences between benign mixed salivary glands tumor and papillary cystadenoma lymphomatous regarding the tumor cell proliferation rate, apoptotic and antiapoptotic activity. The study was performed on archived paraffinembedded salivary glands tissue of 23 benign mixed tumors and five cystadenoma lymphomatosis. Sections were stained with hematoxylin and eosin and cases with the definite

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... diagnosis were selected for immunohistochemistry. The immunoreactivity was assessed in areas of highest positivity regarding Ki-67, P53, and bcl-2. Our results refer that benign mixed tumor and papillary cystadenoma lymphomatous showed negative immune expression for Ki-67. The P53 immune staining in benign mixed tumor appeared negative, while the papillary cystadenoma lymphomatous appeared with mild positive staining. Bcl-2 immune expression in the benign mixed tumor was moderate positive while the papillary cystadenoma lymphomatous was mild positive. We conclude that the benign mixed tumors showed significantly more Ki-67 and bcl-2 immune labeling indexes than papillary cystadenoma lymphomatous, but the P53 immune expression was less (p<0.05). This indicates that the P53 expression was not observed to be correlated with the Ki-67 or bcl-2 overexpression.