Small Cell vs Non-Small Cell Lung Cancer: What’s the Difference?

Lung cancer is one of the leading causes of cancer deaths in Singapore. But not all lung cancers are the same. When doctors diagnose lung cancer, they categorise it into two main types: small cell lung cancer (SCLC) and non-small cell lung cancer (NSCLC). These two types behave very differently, respond to different treatments, and affect survival outcomes in distinct ways. Understanding the difference between small cell vs non-small cell lung cancer can help patients and their families make informed decisions about treatment and care.

In this article, we will explore how these two cancers differ, what symptoms to watch for, how each is treated in Singapore, and what costs you can expect.

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What Are the Two Main Types of Lung Cancer?

Lung cancer begins when abnormal cells grow uncontrollably in lung tissue. Doctors classify the cancer based on the way the cells look under a microscope.

Small cell lung cancer (SCLC) is less common, making up about 10 to 15 percent of lung cancer cases. It tends to grow and spread much faster than other types. In most cases, SCLC is linked to smoking and often starts in the central part of the lungs.

Non-small cell lung cancer (NSCLC) makes up the remaining 85 to 90 percent of cases. This broader category includes three main subtypes:

• Adenocarcinoma, the most common type, especially in non-smokers
• Squamous cell carcinoma, often linked to smoking
• Large cell carcinoma, a rarer but aggressive form

Key Differences Between Small Cell and Non-Small Cell Lung Cancer

1. How They Spread

Small cell lung cancer (SCLC) spreads quickly. It often reaches the brain, bones, liver, and lymph nodes by the time it is diagnosed. Because of this, SCLC is usually detected at an advanced stage.

Non-small cell lung cancer (NSCLC), on the other hand, spreads more slowly. If caught early, doctors can treat it more effectively—sometimes even with curative surgery.

2. Symptoms

Both types can cause:

• Persistent cough
• Chest pain
• Shortness of breath
• Fatigue
• Weight loss
• Coughing up blood

But small cell lung cancer (SCLC) may also cause more severe symptoms earlier due to its rapid growth. In some cases, it may trigger neurological problems like confusion or seizures if it spreads to the brain.

3. Diagnosis and Staging

Learn More: Guide To Medical Imaging >>

Doctors use chest X-rays, CT scans, PET scans, and tissue biopsies to diagnose lung cancer and determine the type. Blood tests and MRI scans may also help assess how far the disease has spread.

Small cell lung cancer (SCLC) is usually staged as:

• Limited stage: Cancer is confined to one lung and nearby lymph nodes
• Extensive stage: Cancer has spread to the other lung or to other parts of the body

Non-small cell lung cancer (NSCLC) uses the standard cancer staging system (Stage I to IV), based on tumour size, lymph node involvement, and spread.

Lung Cancer Treatment Options in Singapore

Small Cell Lung Cancer Treatment

Since SCLC grows rapidly, treatment needs to begin quickly. Surgery is rarely an option, except in very early cases. The main treatment approach includes:

• Chemotherapy to shrink the tumour and control spread
• Radiation therapy, especially if the cancer is still localised
• Prophylactic cranial irradiation (preventative brain radiation), since SCLC often spreads to the brain

Non-Small Cell Lung Cancer Treatment

NSCLC treatment depends heavily on the stage of diagnosis:

• Stage I and II: Surgery is often the first option, followed by chemotherapy or radiation if needed
• Stage III: A combination of chemotherapy and radiation is usually recommended
• Stage IV: Advanced treatments such as targeted therapy or immunotherapy are commonly used

In Singapore, NSCLC patients may receive advanced treatments like EGFR inhibitors or PD-1 inhibitors, especially for certain genetic mutations.

Lung Cancer Treatment Costs in Singapore

Treatment costs can vary significantly depending on the stage, treatment type, and whether care is received in a public or private hospital.

Here is an overview of estimated costs:

• Surgical removal of lung tumours:
  • Public hospital (subsidised, Ward C): around S$2,773
  • Public hospital (unsubsidised, Ward A): about S$8,111
  • Private hospital: approximately S$26,171
• Chemotherapy:
  • Roughly S$544 per day in subsidised care
  • About S$3,152 per session in private hospitals
• Radiation therapy:
  • Costs can range between S$25,000 and S$30,000 for a full course, depending on the number of sessions
• Targeted therapy or immunotherapy:
  • May cost between S$6,000 and S$12,000 per month, depending on the drug used

Patients can use MediSave, MediShield Life, and Integrated Shield Plans to offset a large portion of these costs, especially in public hospitals.

Connect with a Lung Cancer Specialist in Singapore

Recognising the type of lung cancer you or a loved one may be facing can help you plan treatment with greater confidence. Small cell lung cancer progresses rapidly and often requires urgent chemotherapy and radiation. Non-small cell lung cancer, on the other hand, can be more manageable in its early stages—especially with surgery and modern targeted therapies.

Early detection is key. If you’re experiencing symptoms like a persistent cough, breathlessness, or chest pain, click the button below to connect with our preferred lung cancer specialist in Singapore.

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