Six weeks later, the scar of a parotidectomy incision is barely visible.
The branches of the facial nerve are carefully identified with an electric stimulator and preserved
BENIGN PAROTID TUMORS
The majority of parotid tumors (80%) are benign.
Pleomorphic adenoma is the most common parotid gland tumor. It accounts for 70-80% of all benign parotid tumors. The majority of pleomorphic adenomas (90%) arise in the superficial lobe lateral to the facial nerve. Pleomorphic adenomas are painless slowly growing masses. They are usually solitary and well demarcated. They are more common in women. Malignant transformation is seen in only 2-5% of cases and is usually associated with tumors that have been present for 10-15 years.
Mucoepidermoid carcinoma is the most common malignant neoplasm of the parotid gland. It accounts for 10 % of all parotid tumors.
Adenoid cystic carcinoma is the second most common malignant tumor (2-6% of all parotid gland tumors). 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.
Facial weakness is sign of malignancy, and indicates a poor prognosis.
This left deep parotid lobe tumor is being "delivered" between the buccal and zygomatic branches of the left facial nerve. On histopathologic examination, it turned out to be a pleomorphic adenoma (benign mixed tumor)
This cystic Warthin's tumor was located in the tail of the parotid. The grounding electrode of the facal nerve stimulator is placed in the sternocleidomastoid muscle.