Understanding Salivary Gland Lumps
Unusual swellings or lumps in the jaw, mouth, or neck can indicate a serious health issue. If located in the salivary glands, they are referred to as salivary gland lumps and are often caused by a tumour. While this may sound alarming, you can be assured that most of these tumours are non-cancerous and can be effectively managed through removal surgery. Promptly visiting a head and neck surgeon ensures your lump is safely treated and prevents it from escalating into a serious health complication.
At Aglow ENT Centre, our team, led by an experienced ENT head and neck surgeon Dr Ker Liang, is ready to support you with a wide range of head and neck concerns.
What are Salivary Gland Lumps?
The salivary gland lumps are abnormal swellings or masses that can develop in any salivary glands located in the mouth or near the throat. The salivary glands produce saliva that helps to protect the teeth from decay and aids in the initial stages of digestion in the mouth. Saliva is transported from the glands into the mouth through small tubes known as salivary ducts. If any part of a gland or duct becomes obstructed due to infection, inflammation, or growth, it can form salivary gland lumps.
The human body has three major pairs of salivary glands:
- Parotid glands: located just in front of the ears
- Submandibular glands: located under the jaw
- Sublingual glands: located under the tongue
Smaller, minor salivary glands are scattered throughout the mouth and throat. Salivary gland lumps can vary in size, consistency, and cause. While many are benign (non-cancerous), some can indicate more serious conditions, including salivary gland cancers.
In most reported cases, salivary gland lumps are caused by salivary gland tumours.
- Malignant salivary gland tumours are rare, accounting for only 6% of head and neck cancers.
- 80% of salivary gland tumours are slow-growing, benign, and commonly found in the parotid gland.
- Benign tumours can be safely removed through a parotidectomy (removal of the parotid gland).
- Minor salivary gland tumours are uncommon but are 75-80% likely to be malignant when they occur.
Causes of Salivary Gland Lumps
While most lumps develop due to tumours, there are also a variety of other causes that can result in a salivary gland lump:
- Infections: Bacterial and viral infections can lead to swelling and lumps in the salivary glands. Mumps is a well-known viral infection that primarily affects the parotid glands.
- Sialolithiasis (Salivary Gland Stones): Stones forming in the salivary ducts can block saliva flow, leading to swelling and sometimes infection in the gland.
- Cysts: These can form due to injuries, infections, or duct blockages, resulting in fluid-filled lumps.
- Benign Tumors: Non-cancerous growths such as pleomorphic adenomas (tumours composed of a mix of cell and tissue types) are the most common tumours affecting the salivary glands, particularly the parotid glands.
- Malignant Tumors: Salivary gland cancers are rare but can lead to the formation of lumps, often in the parotid glands.
Symptoms of Salivary Gland Lumps
Salivary gland lumps may present with various symptoms, including:
- Visible Lump or Swelling: Lumps that grow in size or do not go away after 2-3 weeks. The location of the lump may indicate which salivary gland is affected:
- Swelling or lump at the sides of the lower cheek for parotid lumps
- Swelling or lump under the jaw for submandibular lumps
- Growth under the tongue for sublingual lumps
- Pain: Typically felt near the salivary gland, it can be constant or come and go. The pain may worsen during eating or chewing and, at times, can spread to the ears.
- Dry Mouth: Caused by decreased saliva production when the salivary ducts are blocked.
- Difficulty Swallowing or Opening the Mouth: Depends on the lump’s location and size.
- Facial Numbness or Weakness: This could happen if the lump presses on nearby nerves, more commonly associated with malignant tumours.
Depending on the cause of your lump, certain symptoms may become more noticeable. For instance, if your lump is caused by an infection or obstruction in the salivary duct, you are likely to experience more pain. This is because the blockage builds up pressure, causing discomfort in the affected area. In the case of tumours, symptoms may not always be obvious. Benign tumours, especially pleomorphic adenomas, are slow-growing and may not cause significant discomfort. They often appear as painless lumps in the jaw, mouth, or throat. In contrast, malignant tumours may grow more rapidly, become harder, and occasionally cause pain.
However, these patterns are not definitive indicators of the cause of a salivary gland lump. Do not delay seeking treatment if you experience any of the above symptoms. Promptly schedule a consultation with a head and neck surgeon. With a proper diagnosis, your surgeon can recommend an appropriate treatment plan.
Who is more Prone to Developing Salivary Gland Lumps?
Certain risk factors increase the chance of developing salivary gland lumps, such as:
- Age: Salivary gland lumps tend to develop in individuals over 50 due to the increased likelihood of mutations as a person ages.
- Radiation exposure: Patients who have undergone radiation treatment for cancer, such as those for head and neck cancers, may increase their risk of developing a salivary gland lump.
- Smoking: Individuals who smoke increase the risk of salivary gland lumps due to the chronic irritation and inflammation of the throat.
- Viral Infections: Individuals with a history of certain infections, such as Epstein-Barr virus, human immunodeficiency virus, and human papillomavirus, may have a higher risk of salivary gland lumps.
- Occupational Hazard: Individuals exposed to harsh substances, such as manufacturing factories or mining, may have an increased risk of salivary gland lumps.
How does a ENT Head and Neck Surgeon in Singapore Diagnose Salivary Gland Lumps?
In Singapore, an ENT head and neck surgeon can accurately diagnose conditions affecting these areas.
The diagnosis of salivary gland lumps typically involves:
- Review of Medical History: Your surgeon will start by assessing your medical history and checking for records of infections that may increase your risk factor.
- Physical Examination: Your surgeon will check for lumps, tenderness, and signs of infection or nerve involvement around the mouth and throat area.
- Sialography: A special dye is injected into the salivary glands to visualise blockages or abnormalities in the ducts through X-rays.
- Imaging Tests: Further imaging tests, such as ultrasounds, CT scans, and MRIs, can help your surgeon determine the lump’s size, location, and characteristics.
- Fine-Needle Aspiration Biopsy: A small needle is used to extract cells from the lump for microscopic examination. This step is crucial to distinguish between benign and malignant lumps.
Based on the diagnostic results, your surgeon will be able to recommend the appropriate treatment, which can range from medications to surgical interventions.
What are the Treatment Options Available for Salivary Gland Lumps?
Treatment for salivary gland lumps depends on the underlying cause.
- Infections: Bacterial infections are treated with antibiotics. Adequate hydration and good oral hygiene can help manage viral infections.
- Salivary Gland Stones: Small stones might pass on their own, but larger ones may require removal, either by manually massaging them out, using shock wave therapy, or through surgical intervention.
- Cysts: Simple cysts may be monitored for changes, while larger or symptomatic cysts might require surgical removal.
- Benign Tumours: Surgical removal is typically recommended to prevent growth and potential complications
- Malignant Tumours: Treatment may involve surgery, radiation therapy, and, in some cases, chemotherapy, depending on the cancer type and stage
When should you see an ENT Head and Neck Surgeon in Singapore?
Salivary gland lumps are a diverse group of conditions that require careful evaluation to determine the underlying cause. While many lumps are benign, seeking medical evaluation for any persistent or growing mass in the salivary gland areas is important. Early diagnosis and appropriate treatment are crucial for managing symptoms and addressing any potential underlying health issues, ensuring the best possible outcomes for those affected. If left untreated, some conditions may progress to serious complications, such as the formation of an abscess or, in rare cases, the development of cancerous cells.
In Singapore, you can schedule a consultation at Aglow ENT Centre with Dr Ker Liang, an experienced ENT head and neck surgeon. With more than 14 years of experience in otolaryngology, Dr Ker Liang specialises in treating various head and neck conditions, including the treatment of salivary gland lumps.
References
- Mayo Clinic. Salivary gland cancer. Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/salivary-gland-cancer/symptoms-causes/syc-20354151#:~:text=Salivary%20gland%20tumors%20can%20happen,cancers%20may%20need%20additional%20treatments. Published 2023. Accessed January 17, 2025.
- Tumors of the head and neck: Salivary gland tumors. MSD Manuals. https://www.msdmanuals.com/professional/ear-nose-and-throat-disorders/tumors-of-the-head-and-neck/salivary-gland-tumors. Published 2023. Accessed January 17, 2025.
- Penn Medicine. Salivary gland tumor. Penn Medicine. https://www.pennmedicine.org/for-patients-and-visitors/patient-information/conditions-treated-a-to-z/salivary-gland-tumor. Published 2023. Accessed January 17, 2025.
Frequently Asked Questions
Can salivary gland lumps go away on their own?
Lumps caused by minor infections can go away independently with hydration and good oral hygiene.
Why do I feel a mass under my tongue?
There are several possibilities for growth under the tongue. You should consult a head and neck specialist to determine if a cyst, salivary stone, tumour, or other causes the mass.
How do I know if I have salivary gland cancer?
You cannot tell unless you undergo diagnostics tests as prescribed by your doctor.
Are antibiotics sufficient enough to treat salivary gland tumours?
No, you will likely need surgery to properly remove the tumour and prevent its growth into a cancerous mass.
Can salivary gland tumours grow back after surgery?
Yes, recurrence is possible, especially if the initial tumours were malignant. Consult your surgeon on the necessary steps to mitigate this risk.
Medical Teaching
Assistant Professor Ker Liang has a passion for teaching and is an Assistant Professor with NUS Yong Loo Lin School of Medicine (YLLSOM). As the NUS-NUH Otolaryngology Department Undergraduate Medical Director, Dr Ker Liang supervises the training of medical students from YLLSOM, NUS. She is actively involved
in the training of postgraduate junior doctors and residents in the Head and Neck Surgery department. She was conferred with an Undergraduate Teaching Award by the National University Health System in 2016 for her outstanding efforts as an Otolaryngology educator.
Medical Teaching
Assistant Professor Ker Liang has a passion for teaching and is an Assistant Professor with NUS Yong Loo Lin School of Medicine (YLLSOM). As the NUS-NUH Otolaryngology Department Undergraduate Medical Director, Dr Ker Liang supervises the training of medical students from YLLSOM, NUS. She is actively involved
in the training of postgraduate junior doctors and residents in the Head and Neck Surgery department. She was conferred with an Undergraduate Teaching Award by the National University Health System in 2016 for her outstanding efforts as an Otolaryngology educator.
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