Differential Parotid gland masses

Benign:
- Pleimorphic adenoma
- Warthin's tumor
- Oncocytoma
- Basal cell adenoma
- hemangioma
- myeloepithelioma

Malignant:
- Mucoepidermoid ca
- Adenoid cystic ca
- Adenoca
- mixed malignant (malignant transformation of pleimorphic adenoma (10% over 15 years))
- Acinic cell ca
- squamous cell ca
- Mets
- Lymphoma
- Sarcoma