Parotid gland myoepitheliomas. Differential diagnosis with pleomorphic adenoma

Myoepitheliomas are rare benign tumours of head and neck. The parotid gland is the most common site of origin. It consists on proliferation of myoepithelial cells and it shows some features similar to preomorphic adenoma although the ductal elements are very low. Diagnosis requires histology and immunohistochemistry because fine needle aspiration often shows erroneous results. Limited parotidectomy is the choice treatment. We report two cases of parotid gland myoepithelioma confirmed by immunohistochemistry.