Pulmonary Sarcoidosis Turkey

What Is Sarcoidosis?

Sarcoidosis is a disease in which the immune system functions abnormally and forms small clusters of inflammatory cells, known as granulomas, in various organs. It most commonly affects the lungs and lymph nodes, but it can also involve the skin, eyes, heart, liver, nervous system, and other organs.

What Causes Sarcoidosis?

The exact cause of sarcoidosis remains unknown. Researchers believe that in genetically predisposed individuals, certain environmental factors—such as microorganisms, dust, molds, or chemical substances—may trigger an exaggerated immune response.

Sarcoidosis is a multisystem inflammatory disease characterized by the presence of non-caseating granulomas, which are small collections of immune cells that develop within affected tissues.

Although its precise cause has not been identified, current research suggests that the disease results from an abnormal immune response to an unidentified trigger in genetically susceptible individuals.

Potential triggers include exposure to environmental or occupational agents such as dust, mold, or metals, as well as infectious microorganisms, including Mycobacterium and Propionibacterium species. In individuals with certain genetic predispositions, these triggers may cause the immune system to remain chronically activated even after the initial stimulus has disappeared. This persistent immune response leads to inflammation and granuloma formation, most commonly in the lungs and lymph nodes, but also in organs such as the eyes, skin, heart, and nervous system.

Who Gets Sarcoidosis?

• It most commonly begins between the ages of 20 and 40.
• It is seen slightly more frequently in women.
• Although it can occur in all races and populations, it may have a more severe course in people of African descent.

What Are the Symptoms of Sarcoidosis?

The symptoms of sarcoidosis can vary widely, and in some cases, there may be no noticeable symptoms at all. The most common include:

• Chronic fatigue
• Dry cough
• Shortness of breath
• Chest pain
• Fever
• Red, painful skin lesions (especially on the legs)
• Redness and pain in the eyes

Stages of Sarcoidosis (Based on Chest X-Ray)

Stage 0

• Findings: No abnormalities on chest X-ray.
• Condition: Sarcoidosis may be present in other organs, but there is no involvement of the lungs or thoracic lymph nodes.

Stage 1

• Findings: Enlargement of the lymph nodes in the chest (hilar and mediastinal lymphadenopathy).
• Condition: The lung tissue appears normal. It is often asymptomatic.

Stage 2

• Findings: Both lymph node enlargement and involvement of the lung tissue are present.
• Condition: Symptoms such as cough and shortness of breath are more common.

Stage 3

• Findings: Lung tissue involvement is present without significant lymph node enlargement.
• Condition: Lung function begins to decline.

Stage 4

• Findings: Permanent structural changes and fibrosis (scar tissue) are present in the lungs.
• Condition: Shortness of breath may be significant; the disease is usually chronic at this stage.

Important Note: The stages do not necessarily represent disease progression. Patients may be diagnosed directly at Stage 2 or 3. In addition, radiological stage does not always correlate with disease severity; even low-stage disease can sometimes involve significant organ involvement.

How Does Sarcoidosis Progress?

• In some patients, the disease may resolve completely within a few months without any treatment.
• In others, it may persist for years and lead to permanent organ damage.
• The most important risk is the development of permanent lung damage (pulmonary fibrosis).

How Is Sarcoidosis Diagnosed?

There is no single definitive test for sarcoidosis. The diagnosis is made by combining clinical findings, imaging studies, and biopsy results.

1. Imaging Methods

Imaging studies usually provide the first clues.

• Chest X-ray → The primary method for staging the disease
• Computed Tomography (CT) → Provides a more detailed assessment of lymph node enlargement and lung involvement
• PET-CT → Useful for identifying active disease sites and guiding biopsy
• MRI → Used when cardiac or neurological involvement is suspected

2. Laboratory Tests

Blood tests that may suggest sarcoidosis but are not diagnostic on their own:

• Serum calcium → May be elevated
• ACE (Angiotensin-Converting Enzyme) levels → Often elevated but not specific
• Liver and kidney function tests → To assess organ involvement
• CRP and ESR → Inflammatory markers
• Complete blood count → May show anemia or changes in immune cells

3. Pulmonary Function Tests

• Spirometry → Evaluates lung capacity and airway function
• DLCO (Diffusing capacity for carbon monoxide) → Assesses gas exchange efficiency

4. Eye and Heart Evaluatio

• Eye examination (slit-lamp exam) → To detect uveitis and other ocular involvement
• ECG and echocardiography → To assess cardiac rhythm and possible heart involvement

5. Definitive Diagnosis: Biopsy

Biopsy is the gold standard for diagnosis. Methods include:

• Lymph node biopsy (cervical, axillary, or intrathoracic via EBUS-TBNA – endobronchial ultrasound-guided biopsy)
• Lung biopsy (transbronchial biopsy via bronchoscopy)
• Skin biopsy (if skin lesions are present)

The goal is to demonstrate non-caseating granulomas under the microscope and exclude other causes (such as tuberculosis).

Summary

Sarcoidosis is diagnosed through a combination of:

• clinical symptoms,
• imaging findings,
• biopsy showing granulomas, and
• exclusion of other diseases.

How Is Sarcoidosis Treated?

The treatment of sarcoidosis is individualized based on the organs involved, the severity of symptoms, and the course of the disease. Not every patient with sarcoidosis requires medication; in mild cases, regular follow-up alone may be sufficient.

1. Cases That Do Not Require Treatment

• Mild symptoms (e.g., mild cough or small skin lesions)
• Stage 1 pulmonary sarcoidosis (only lymph node enlargement without lung tissue involvement)
• Cases with a high likelihood of spontaneous resolution

In these situations, the patient is monitored with regular follow-ups every 3–6 months, including physical examinations, blood tests, and imaging studies.

2. Cases That Require Treatment

• Severe or progressive lung involvement
• Eye involvement (risk of vision loss)
• Cardiac involvement (risk of arrhythmia or heart failure)
• Nervous system involvement (neurosarcoidosis)
• Significant skin lesions
• Hypercalcemia (elevated blood calcium levels)

3. Medical Treatment

First-line therapy: Corticosteroids

• Prednisolone is the most commonly used medication
• High doses are typically started for the first 4–6 weeks, then gradually tapered
• Goal: to suppress inflammation and prevent organ damage
• Side effects: weight gain, osteoporosis, elevated blood sugar, increased risk of infection
• Calcium and vitamin D supplementation is often recommended during long-term use

Second-line therapy: Steroid-sparing agents

• Methotrexate
• Azathioprine
• Leflunomide

These are used for long-term maintenance therapy to reduce the side effects of corticosteroids.

Biologic therapies (in resistant cases)

• Anti-TNF agents (e.g., infliximab, adalimumab)
• Particularly used in neurosarcoidosis or treatment-resistant cases

4. Supportive Treatment

• Oxygen therapy (in advanced lung disease)
• Physical activity and breathing exercises
• Smoking cessation
• Bone protection measures during steroid use (nutrition and supplements)

5. Follow-up

Patients who start treatment should be monitored regularly, especially during the first 3–6 months. Clinical assessment is performed to evaluate disease status, along with blood tests including calcium, liver and kidney function. Pulmonary function tests are recommended, and CT or MRI imaging may be used when necessary.

Sarcoidosis is not a disease that always requires medication. The decision to treat depends on organ involvement, severity of symptoms, and risk of progression. Corticosteroids are the first-line treatment, while additional drugs may be used to reduce long-term side effects. The management of pulmonary sarcoidosis is guided by clinical findings, radiological stage, and functional impairment. Many cases may improve spontaneously without treatment.

Treatment of Pulmonary Sarcoidosis

1. Pulmonary Sarcoidosis That Does Not Require Treatment

• Stage 1 disease (only hilar/mediastinal lymphadenopathy, no lung involvement)
• Stage 2–3 disease that is mild and stable (normal pulmonary function tests, no significant symptoms)

These patients are followed with clinical examinations, pulmonary function tests, and imaging every 3–6 months.

2. Conditions Requiring Treatment

Treatment is considered if any of the following are present:

Symptomatic or progressive disease

• Significant shortness of breath, cough, or chest pain
• Decline in pulmonary function tests (reduction in FVC or DLCO)
• Radiological progression

Risk of vital organ involvement

• Advanced pulmonary involvement (Stage 3–4) with hypoxemia
• Rapid clinical deterioration during acute exacerbations

3. Treatment Approach

First-line therapy: Corticosteroids

• Prednisolone is started, typically at 20–40 mg/day
• Response is evaluated after 4–6 weeks
• If clinical and functional improvement is achieved, the dose is gradually tapered over 6–12 months or reduced to a maintenance dose

Goal: to relieve symptoms, preserve lung function, and prevent disease progression

Steroid-sparing agents (when long-term high-dose steroids are needed or side effects occur)

• Methotrexate (most commonly used)
• Azathioprine
• Leflunomide

Biologic agents (in refractory cases)

• Anti-TNF therapies (infliximab, adalimumab)
• Mainly used in progressive disease that does not respond to corticosteroids or other immunosuppressive agents

4. Supportive Measures

• Smoking cessation
• Regular exercise and pulmonary rehabilitation
• Calcium and vitamin D supplementation for bone protection during steroid use
• Oxygen therapy in advanced stages with hypoxemia

5. Follow-up

• Pulmonary function tests every 3–6 months
• Monitoring of clinical symptoms
• Chest X-ray or CT scan when necessary
• If long-term corticosteroids are used: monitoring of blood glucose, blood pressure, and bone mineral density

Does Sarcoidosis Get Better?

The course of sarcoidosis varies greatly from person to person. In many patients with mild disease involving only the lungs and lymph nodes, the condition may resolve spontaneously within months or a few years without leaving permanent damage.

However, in some cases, the disease may become chronic and lead to progressive impairment of organ function. Complications such as pulmonary fibrosis, cardiac arrhythmias, or vision loss highlight the importance of early diagnosis and regular follow-up. Treatment is generally planned according to the severity of organ involvement and the patient’s symptoms.

Corticosteroids are the first-line treatment to reduce inflammation; in resistant or severe cases, immunosuppressive drugs such as methotrexate or azathioprine may also be used. Although there is no definitive cure, a significant proportion of patients can achieve long-term remission, especially when diagnosed early and treated appropriately.

Adopting a healthy lifestyle, avoiding known environmental triggers, and maintaining regular medical follow-up can significantly improve long-term outcomes.

1. Spontaneous Resolution Rate

One important feature of sarcoidosis is its potential to regress spontaneously without any treatment. Approximately 60–80% of Stage 1 cases and 50–60% of Stage 2 cases resolve completely, usually within 1–2 years.

2. Chronic Course

In some patients, the disease progresses slowly and may persist for many years.

Stage 3–4 cases (those with established pulmonary fibrosis) often result in permanent structural changes.

Patients with involvement of vital organs such as the heart or nervous system have a higher risk of chronic disease.

3. Recurrence After Complete Recovery

Even after full recovery, sarcoidosis may recur in about 5–10% of cases.

Relapses most commonly occur within the first 3 years.

4. Factors Affecting Prognosis

Favorable prognostic factors:

• Early stage disease (Stage 1–2)
• Mild symptoms
• Isolated lymph node involvement

Unfavorable prognostic factors:

• Stage 3–4 disease
• Multiorgan involvement
• Chronic disease course history

Is Sarcoidosis a Cancer?

Sarcoidosis is a disease of unknown cause characterized by the abnormal activation of the immune system, leading to the accumulation of inflammatory cell clusters (granulomas),particularly in organs such as the lungs, lymph nodes, skin, and eyes. Although it may resemble cancer in some aspects—such as abnormal tissue growth and organ enlargement—sarcoidosis is not cancer.

Cancer occurs when cells grow uncontrollably and spread to surrounding tissues and distant organs. In sarcoidosis, however, the cell accumulation is related to immune system activation or inflammatory responses and is usually controllable.

Nevertheless, lymph node enlargement or lung nodules caused by sarcoidosis can sometimes mimic tumors on imaging studies. Therefore, a definitive diagnosis requires biopsy and pathological examination. In addition, although rare, some studies suggest that long-term inflammatory processes may be a risk factor for certain types of cancer; therefore, regular follow-up of patients with sarcoidosis is important.

How Should Patients with Sarcoidosis Eat?

There is no specific “sarcoidosis diet,” but dietary recommendations are important due to the inflammatory nature of the disease, corticosteroid use, and possible organ involvement.

1. Anti-inflammatory diet

Since sarcoidosis is an immune-mediated inflammatory disease, foods that help reduce inflammation are recommended:

• Fruits and vegetables, especially colorful ones (broccoli, spinach, red pepper, blueberries, pomegranate)
• Omega-3 sources (salmon, mackerel, walnuts, flaxseed, chia seeds)
• Whole grains (oats, whole wheat, buckwheat, quinoa)
• Extra virgin olive oil
• Anti-inflammatory spices (turmeric, ginger)

2. If you are using corticosteroids

Long-term corticosteroid therapy may cause:

• Increased need for calcium and vitamin D (to prevent bone loss)
• Reduced salt intake requirement (to reduce edema and hypertension risk)
• Increased blood sugar levels (refined sugar and white flour should be limited)

Recommendations:

• Low-salt dairy products (milk, yogurt, kefir, cheese)
• Green leafy vegetables (spinach, chard, arugula)
• Unsalted nuts
• Avoid sugary foods

3. Risk of hypercalcemia

In sarcoidosis, immune cells may produce excess vitamin D, which can lead to elevated blood calcium levels. Therefore:

• Avoid excessive calcium intake
• Do not take vitamin D supplements without medical advice
• Maintain adequate fluid intake

4. Patients with liver or kidney involvement

• Protein intake should be adjusted according to medical advice
• Alcohol should be completely avoided
• Processed foods (packaged snacks, sausages, cured meats) should be avoided

5. General lifestyle recommendations

• Stop smoking
• Drink sufficient water (2–2.5 liters per day unless restricted)
• Engage in regular moderate exercise
• Maintain a healthy body weight

What Should Sarcoidosis Patients Avoid Eating?

Because sarcoidosis is associated with immune system overactivity, diet can directly affect inflammation levels and organ function.

Due to the risk of elevated blood calcium levels, excessive intake of high-calcium foods (such as large amounts of milk, cheese, yogurt, and calcium supplements) should be avoided or carefully monitored.

Excess calcium may lead to kidney stones or kidney damage. In addition, processed and high-salt foods (ready-to-eat snacks, sausages, cured meats, canned products) should be limited, as they may increase edema and blood pressure.

Excess sugar and refined carbohydrates (white bread, sweets, sugary drinks) may disrupt immune balance and worsen inflammation. If the patient is on corticosteroid therapy, foods high in saturated fats (fried foods, fast food, margarine) should also be avoided due to the risk of increased blood sugar and cholesterol levels. Alcohol should be restricted, as it may increase liver burden and interfere with medications. Nutrition should always be individualized based on disease stage, organ involvement, and ongoing treatments.

Is Sarcoidosis Contagious?

No, sarcoidosis is not a contagious disease.

Why is sarcoidosis not contagious?

Sarcoidosis is not caused by bacteria, viruses, or fungi. It results from an abnormal immune system response. Granulomas form in organs such as the lungs and lymph nodes, but these are inflammatory structures, not infectious agents.

Current scientific evidence clearly shows that sarcoidosis cannot be transmitted from person to person through coughing, contact, or blood. Some studies suggest that environmental factors, genetic predisposition, and immune system dysregulation may play a role in its development, but the exact cause is still unknown.

Although not contagious, sarcoidosis symptoms may resemble infectious diseases such as tuberculosis or lymphoma, so detailed diagnostic testing and biopsy are essential. There is no infection risk for people around patients with sarcoidosis, but patients themselves require regular monitoring and treatment when necessary.

Daily Life Recommendations for Pulmonary Sarcoidosis

• Regular medical follow-up is essential
• Smoking should be avoided, as it worsens lung function
• Healthy diet and regular exercise support immune and overall health
• If long-term corticosteroids are used, bone health should be protected (calcium and vitamin D supplementation if advised by a doctor)