<prompt> The following are the high grade salivary gland malignancies, except:Basal cell adenocarcinomaMucoepidermoid carcinomaAdenoid cystic carcinomaSalivary duct carcinoma  <response>: Basal cell adenocarcinoma of salivary glands is an uncommon neoplasm occurring almost exclusively in major salivary glands. It is a low-grade malignant neoplasm, cytologically similar to basal cell adenoma, but is infiltrative and has a small potential for metastasis.Reference: Shafers Textbook of ORAL PATHOLOGY Eighth Edition page no 285 