da Rocha Tenório J, et al. - In pleomorphic adenomas (PA), mucoepidermoid carcinomas (MEC) and adenoid cystic carcinomas (AdCC) of salivary glands, authors evaluated the immunoexpression of cyclooxygenase-2 (COX-2) and cyclin D1 proteins. Salivary gland tumors have different profiles, which was emphasized by the overexpression of COX-2, observed only in MEC. In malignant tumors, cyclin D1 is more immunoexpressed. For differentiating the studied tumors, these immunohistochemical findings together may be useful.