Treatment is superficial parotidectomy. Mucoepidermoid carcinoma is the most common malignant neoplasm of the parotid gland. Adenoid cystic carcinoma is the most common malignant tumor of the submandibular gland, also called the submaxillary gland. Adenoid cystic carcinoma is particularly nasty in that it has a very high tendency to invade and travel along nerves, making curative resections very difficult. Acinic cell carcinoma and these others are less common salivary gland malignancies.
Facial weakness is sign of malignancy, and it's also a sign of poor long-term survival.
Nonepithelial neoplasms of the salivary glands are uncommon in adults. In children, salivary gland tumors are rare. Non-epithelial tumors are the most common in children. Specifically, the most common salivary gland tumor in children is hemangioma. The most common malignant tumor is mucoepidermoid carcinoma, the same as in adults.