Sarcoidosis (Salivary Gland Involvement)

This leaflet provides information about Sarcoidosis, with a specific focus on how it affects the salivary glands (often referred to as Parotid Sarcoidosis). It covers the symptoms, how the diagnosis is made, and the available treatment options. If you have any further questions, please discuss them with your specialist team.

What is Sarcoidosis?

Sarcoidosis is a multi-system inflammatory disease of unknown cause. It is characterized by the formation of "granulomas" — small, ball-like clusters of white blood cells. When these granulomas build up in an organ, they cause inflammation that can affect the organ's normal function and, in some cases, lead to permanent scarring.

Sarcoidosis is often called the "great mimicker" because its symptoms can resemble many other diseases. It most commonly affects the lungs and the lymph nodes in the chest, but it can affect almost any organ in the body, including the skin, eyes, and salivary glands. Sarcoidosis is not contagious.

Who is Affected?

Sarcoidosis occurs worldwide but is most common in young adults between the ages of 20 and 40. It is seen more frequently in people of African-American and Northern European descent. When the disease specifically affects the parotid (salivary) glands, it is slightly more common in women in their 30s and 40s.

What are the Symptoms?

Up to half of people with sarcoidosis may have no obvious symptoms when first diagnosed. When symptoms do occur, they depend heavily on which organs the granulomas are growing in.

Salivary Gland & Head/Neck Symptoms

Salivary gland involvement occurs in about 5% to 10% of patients with sarcoidosis.

• Parotid Swelling: The most common presentation in the head and neck is a persistent, diffuse, and often painless swelling of the parotid glands (the large salivary glands in front of the ears). This swelling is usually bilateral (affecting both sides).
• Dry Mouth: Some patients may experience a dry mouth due to reduced saliva production.
• Enlarged Lymph Nodes: Swollen lymph nodes in the neck are common.
• Heerfordt’s Syndrome: This is a rare but highly specific presentation of sarcoidosis characterized by a triad of symptoms: bilateral parotid swelling, inflammation of the eye (uveitis), and temporary facial nerve paralysis (weakness of the facial muscles).

Systemic Symptoms (Whole Body)

• General: Fatigue, weakness, weight loss, and fevers.
• Lungs: Shortness of breath, wheezing, or a persistent dry cough.
• Eyes: Pain, redness, sensitivity to light, and blurred vision. (Annual eye exams are highly recommended for all sarcoidosis patients).
• Skin & Joints: Raised reddish-purple skin patches (such as lupus pernio on the face) or painful nodules under the skin, along with joint stiffness and swelling.

How is it Diagnosed?

Because it mimics other diseases, diagnosing sarcoidosis requires a careful and comprehensive evaluation:

• Imaging:
  • Ultrasound: High-frequency ultrasound of the neck is often the first step to assess the swollen salivary glands and lymph nodes.
  • CT/MRI: Scans of the head, neck, and chest are used to look for characteristic lymph node enlargement and lung involvement.
  • Gallium or PET Scans: These specialized scans can highlight areas of active inflammation. A specific pattern called the "Panda Sign" (uptake in the parotid and tear glands) is strongly suggestive of sarcoidosis.
• Blood Tests: Your doctor may check for elevated levels of Calcium or an enzyme called S.A.C.E. (Serum Angiotensin Converting Enzyme), which can sometimes be high in sarcoidosis.
• Biopsy (The Gold Standard): A tissue sample (biopsy) of the swollen salivary gland, an enlarged lymph node, or lung tissue is usually required. Examining this tissue under a microscope to find the characteristic non-caseating granulomas is the only way to definitively confirm the diagnosis.

What is the Treatment?

The majority of patients with sarcoidosis are not severely disabled by the illness. In fact, up to half of all people diagnosed will improve within two years without any treatment at all.

Because the disease often goes into spontaneous remission, and because the swelling of the parotid gland is usually self-limiting, the decision to treat is carefully weighed against the side effects of the medications.

• Observation ("Watch and Wait"): If symptoms are mild and organ function is not threatened, your doctor may simply monitor you closely without prescribing medication.
• Corticosteroids (Steroids): If treatment is necessary to reduce severe inflammation and prevent organ scarring, steroids (like Prednisone) are the main treatment. They are very effective at shrinking the granulomas and relieving symptoms.
• Steroid-Sparing Medications: If steroids are required long-term, or if they are not effective, your doctor may prescribe other immunosuppressant medications (such as Methotrexate, Azathioprine, or Infliximab) to control the disease while minimizing steroid side-effects.

Long-Term Outlook

The prognosis for sarcoidosis is generally very good. Most people recover completely, and the swollen salivary glands often subside within 6 months to 3 years. It is important to attend all follow-up appointments with your specialist to monitor your lung function, eye health, and overall progress, even if you are feeling well.