FAQs

Small cell lung cancer is a fast-growing type of cancer that begins in the tissues of the lung. It's named for the small, oval appearance of the cancer cells under a microscope. SCLC accounts for about 10% to 15% of all lung cancers and tends to spread quickly to other parts of the body.^1,2

The two main types of lung cancer are small cell lung cancer (SCLC) and non-small cell lung cancer (NSCLC). They differ in how the cancer cells look under a microscope, how quickly they grow, and how they're treated. SCLC tends to grow and spread faster than NSCLC, but it often responds well to initial treatment. NSCLC is more common, accounting for about 85% of lung cancers.^1,3

Smoking is the most significant risk factor for developing SCLC—about 95% of cases are linked to smoking. Other risk factors include exposure to secondhand smoke, radon, asbestos, and other carcinogens, as well as having a family history of lung cancer. However, SCLC can occur in people who have never smoked.^4,5

While having a family history of lung cancer may increase your risk, SCLC is not typically considered a hereditary cancer. The primary risk factor is smoking and exposure to environmental carcinogens.^4,5

SCLC is usually diagnosed through a combination of imaging tests (like chest X-rays or CT scans) and a biopsy, where a small sample of tissue is examined under a microscope. Additional tests may be done to determine if and where the cancer has spread.^3,4

Unlike other cancers for which a numbered staging system (I-IV) is commonly used, SCLC is typically classified into 2 stages^4,6:

• Limited stage: Cancer is found in one lung and may have spread to nearby lymph nodes on the same side of the chest. About 1 in 3 people are diagnosed at this stage
• Extensive stage: Cancer has spread beyond one lung—to the other lung, lymph nodes on the other side of the chest, or to other parts of the body. About 2 in 3 people are diagnosed at this stage

SCLC grows and spreads quickly, and early symptoms can be subtle or mistaken for other conditions. Many people don't experience noticeable symptoms until the cancer has already spread, which is why most people are diagnosed at the extensive stage.^1,7

• Limited-stage SCLC is often treated with a combination of chemotherapy and radiation therapy given together, sometimes followed by immunotherapy. Radiation to the brain (prophylactic cranial irradiation) may also be recommended to help prevent the cancer from spreading there. Surgery may be performed depending on the situation³
• Extensive-stage SCLC is typically treated with chemotherapy combined with immunotherapy. Radiation may be used to relieve symptoms or treat specific areas where the cancer has spread³

Maintenance therapy is ongoing treatment given after the initial rounds of chemotherapy and immunotherapy to help keep the cancer from growing or coming back. For SCLC, this may include immunotherapy and another chemotherapy. Ask your doctor if maintenance therapy is part of your treatment plan.^8,9

If SCLC returns (recurs) after initial treatment, additional treatment options may be available. The approach depends on how long it's been since your last treatment, where the cancer has returned, and your overall health. Your care team can discuss options, which may include different chemotherapy drugs, immunotherapy, clinical trials, or supportive care.^3,4,10

Yes. Clinical trials are research studies that test new treatments or new ways of using existing treatments. They may offer access to therapies not yet widely available. Ask your care team if there are clinical trials that might be appropriate for your situation.⁴

Find SCLC Clinical Trials

Symptoms of SCLC may include⁷:

• A persistent cough or a cough that gets worse
• Chest pain
• Shortness of breath
• Coughing up blood
• Fatigue or weakness
• Loss of appetite or unexplained weight loss
• Hoarseness
• Swelling in the face or neck veins

Some people have no symptoms in the early stages, and SCLC is sometimes found during imaging tests done for another reason.⁴

Side effects vary depending on the type of treatment but may include^11–13:

• Fatigue
• Nausea and vomiting
• Loss of appetite
• Hair loss
• Increased risk of infection
• Anemia (low red blood cell count)
• Mouth sores
• Changes in taste
• Overreaction of the immune system

Your care team can help you manage side effects. Don't hesitate to tell them what you're experiencing.

Fatigue is one of the most common side effects of cancer treatment. Strategies that may help include¹⁴:

• Resting when you need to, but staying as active as you can
• Asking for help with daily tasks
• Eating well and staying hydrated
• Talking to your care team about physical therapy or exercise programs
• Prioritizing what matters most and letting go of what doesn't

Many organizations offer resources, information, and support for people with lung cancer and their care partners. Some include:

• LUNGevity Foundation
• Small Cell SMASHERS
• GO2 for Lung Cancer
• American Cancer Society
• CANCERcare^®
• Lung Cancer Research Foundation
• Lung Cancer Foundation of America
• Cancer Support Community

You can also ask your care team about support groups, social workers, or counselors at your treatment center.

Being present, listening, and offering practical help can make a meaningful difference. Let your loved one tell you what they need—some days they may want company, other days they may need space. Take care of yourself, too, and don't hesitate to seek support for your own well-being.

The Doctor Discussion Guide can help you prepare for conversations with your care team and take notes during your appointments. Download it to get started.