Parotid Gland Tumours and Facial Nerve Risk: What to Expect from Surgery
When you notice a mass slowly growing in front of your ear or on the side of your jaw, you may think it is just a simple swelling. However, tumors developing in the parotid gland, which is the largest salivary gland in the body, are a matter that needs to be handled with care, especially due to their close anatomical relationship with the facial nerve. These tumors can threaten the nerve that controls the facial muscles due to their location. This situation carries the risk of temporary or permanent facial paralysis during or after surgery. So, what kind of treatment process can you expect if such a tumor is detected? How is the facial nerve protected during surgery? What can you expect regarding your facial movements after surgery? Are you curious? Take a look at our content right away. We wish you all healthy days and happy reading.
What are Parotid Gland Tumors?
The parotid gland is the largest salivary gland in the body, located at the edge of the jaw and in front of the ear, and aids digestion by secreting saliva into the mouth. Tumors that form in this gland usually grow slowly and are mostly benign, but some can be malignant. The most common benign parotid tumor is the pleomorphic adenoma, which typically presents as a painless, firm, and movable mass. Another important characteristic of parotid gland tumors is their close proximity to the facial nerve. Therefore, early diagnosis and appropriate surgical planning are critical for both tumor control and the preservation of facial functions.
Symptoms of Parotid Gland Tumors
Parotid gland tumors also have certain symptoms. These symptoms vary depending on the course of the disease. These symptoms are detailed as follows:
- Lump in front of the ear or on the side of the jaw
- Facial asymmetry
- Weakness in facial muscles
- Earache or jaw pain
- Skin discoloration or sores
- Blood in saliva or dry mouth
- Swollen lymph nodes
Do Parotid Gland Tumors Cause Facial Paralysis?
Parotid gland tumors can generally cause facial paralysis. This risk is directly related to the location, size, and type of the tumor. In this context, the parotid gland is the only salivary gland through which the facial nerve (nervus facialis), an important nerve that controls the movement of the facial muscles, passes. Due to this anatomical proximity, as the tumor grows, it can put pressure on the facial nerve or narrow the canal through which the nerve passes, disrupting electrical transmission and causing symptoms such as weakness in the facial muscles, difficulty closing the eyes, and drooping of the corner of the mouth. For this reason, facial paralysis is considered an important warning sign that a mass in the parotid region may be malignant, and a detailed diagnostic process should be initiated immediately.
Precautions to Prevent Parotid Gland Tumors from Causing Facial Paralysis
Certain precautions must be taken to prevent parotid tumors from causing facial paralysis. In this context, the following precautions should be taken:
Regular doctor checkups should be performed for early diagnosis: Any lump detected in front of the ear or on the edge of the jaw should be shown to an ear, nose, and throat (ENT) specialist without delay.
The relationship with the facial nerve should be evaluated with imaging: Advanced imaging methods such as MRI or CT should be used to determine the proximity of the tumor to the nerve, and surgery should be planned accordingly.
Surgical intervention should be performed by an experienced team: During parotid surgery, it is important to use advanced techniques such as microscopic dissection and nerve monitoring to protect the facial nerve.
Tumor growth should not be expected: Even if it is “benign,” as the tumor grows, it may approach the nerve and become more difficult to remove, which increases the risk of paralysis.
Special precautions should be taken if there is a history of radiotherapy or previous surgery: Previous interventions may have hardened the tissues, making the nerve more vulnerable.
Open communication with the physician is essential, and potential risks should be discussed beforehand: The patient should be informed about the risk to the facial nerve, and expectations should be clarified before surgery.
Postoperative facial exercises and follow-up should not be neglected: Physical therapy initiated early in the postoperative period is effective in rapidly recovering from potential nerve weakness.
Diagnostic Process for Parotid Gland Tumors
The diagnostic process for parotid gland tumors requires a multidisciplinary approach to evaluate both the structure of the tumor and its proximity to vital structures such as the facial nerve. Accordingly, the first step is to take a detailed history of the patient and perform a physical examination. Imaging methods are then used following the clinical evaluation. In this process, ultrasound is a non-invasive method that provides an initial idea about the mass; however, magnetic resonance imaging (MRI) or computed tomography (CT) is preferred for further evaluation. Based on these imaging findings, a fine needle aspiration biopsy (FNAB) may be performed if deemed necessary. FNAB provides preliminary information about whether the mass is benign or malignant and contributes to surgical planning. Ultimately, the use of appropriate techniques in the diagnostic process is critical for both effective treatment planning and the preservation of important structures such as the facial nerve.
Treatment Methods for Parotid Gland Tumors
The treatment method for parotid gland tumors is determined based on whether the tumor is benign or malignant, its size, location, and relationship with the facial nerve. In this context, the most common treatment method is surgery, which is called parotidectomy. If the tumor is located in the superficial part of the parotid gland, superficial parotidectomy may be sufficient; however, if it is located in the deep lobe or close to the nerve, total parotidectomy may be necessary. The main reason for this is to protect the facial nerve during surgery.
In malignant tumors that are very close to or wrapped around the facial nerve, part of the nerve may have to be removed; in this case, cross facial nerve grafting or facial nerve transfer using microsurgery may be used. Additionally, in the postoperative period, physical therapy and supportive treatments such as botulinum toxin may be added to the treatment regimen to address any facial muscle weakness that may develop. A multidisciplinary approach is essential throughout the entire treatment process to achieve the best possible outcomes both aesthetically and functionally.
If you are experiencing facial paralysis caused by parotid tumors, you can contact Dr. Berke Özücer and his team, who are experts in facial paralysis surgery.
