What are Salivary Gland Tumors?
Salivary glands produce saliva, which is essential for digestion, keeping the mouth moist, and protecting the body against infections. We have three pairs of major salivary glands: the Parotid (in front of the ears), Submandibular (under the jaw), and Sublingual (under the tongue). When cells in these glands multiply out of control, salivary gland tumors form. While the majority of these tumors are benign (non-cancerous), some can be malignant (cancerous) and pose a serious threat to health.
Benign vs. Malignant Tumors
- Benign Tumors: Include Pleomorphic Adenoma (the most common) and Warthin's tumor. They grow very slowly, are usually painless, and do not spread to other parts of the body.
- Malignant Tumors (Salivary Gland Cancer): Include Mucoepidermoid carcinoma and Adenoid cystic carcinoma. These grow rapidly, can cause significant pain, and have the potential to metastasize to lymph nodes, lungs, or bones.
Causes and Risk Factors
While the exact cause is often unknown, several factors increase the risk of developing these tumors:
- Advanced age and genetic predisposition.
- Heavy smoking and alcohol consumption (Warthin's tumors are heavily linked to smoking).
- Previous exposure to radiation therapy in the head and neck region.
- Occupational exposure to certain chemicals in the rubber, asbestos, or plumbing industries.
Symptoms to Watch For
Any persistent changes or lumps in the face, neck, or jaw should be evaluated by an ENT specialist:
- A visible, often painless lump or swelling near the ear, jaw, or in the mouth.
- Pain or tenderness in the area of the lump, especially if it grows rapidly (a sign of malignancy).
- Facial weakness, numbness, or paralysis on one side of the face, occurring when a tumor presses against the facial nerve.
- Difficulty opening the mouth wide or trouble swallowing.
Treatment Options and Surgery
Diagnosis typically involves physical examination, Ultrasound, MRI scans, and a Fine-Needle Aspiration Biopsy (FNAB) to determine if the tumor is cancerous. The primary treatment for both benign and malignant tumors is surgical removal:
- Parotid Gland Surgery (Parotidectomy): The majority of tumors occur in the parotid gland. The facial nerve, which controls all facial expressions, runs directly through this gland. The most critical aspect of this surgery is using advanced nerve monitoring technology to carefully remove the tumor while preserving the facial nerve entirely.
- Submandibular Gland Surgery: Tumors in this area usually require the complete surgical removal of the affected gland.
For malignant (cancerous) tumors, surgery may also involve removing the lymph nodes in the neck (Neck Dissection) to prevent the cancer from spreading. Post-operative Radiation Therapy or Chemotherapy may be required depending on the stage and aggressiveness of the cancer. For benign tumors, successful surgical removal usually results in a complete cure without the need for further treatments.