The major salivary glands consist of the parotid, submandibular, and sublingual glands. The glossopharyngeal nerve has parasympathetic fibers that innervate the parotid salivary gland. Neoplastic lesions of the parotid salivary gland can either be benign or malignant. Sialadenitis is swelling and inflammation of the parotid, submandibular, or sublingual major salivary glands. Parasympathetic component of the glossopharyngeal nerve that innervates the ipsilateral parotid gland. This redirects the duct from the parotid salivary gland to the eye. This is then usually followed by painful swelling of one or both parotid salivary glands. Tuberculosis and syphilis can cause granuloma formation in the parotid glands. The glossopharyngeal nerve also provides parasympathetic input to the parotid gland. Other possible manifestations are dry lips, burning tongue, parotid gland swelling, and temporomandibular disorders. Mumps is a viral infection, caused by infection in the parotid gland. About 80% of tumors of the parotid gland are benign. Gwynn had three procedures to remove noncancerous growths from his parotid gland beginning in 1997. Sometimes accessory parotid glands are found close to the main parotid glands. Inflammation of one or both parotid glands is known as parotitis.