Lung cancers develop in cells that line the bronchi and in a part of the lung tissue called the alveoli, which are air sacs where gases exchange. Changes to DNA cause cells to grow more rapidly. Show There are two main types of lung cancer:
Keep reading to find out more about the similarities and differences between these two types. Approximately 10 to 15 percent of lung cancer cases are SCLC. SCLC usually starts near the center of the chest around the bronchi. It’s a fast-growing form of cancer that tends to spread in its early stages. It tends to grow and spread much faster than NSCLC. SCLC is rare in nonsmokers. Approximately 80 to 85 percent of lung cancer cases are NSCLC. There are three types of NSCLC:
Early stage lung cancer doesn’t usually produce obvious symptoms. As the cancer progresses, there may be:
Other symptoms may include:
Smoking is the biggest risk factor for both SCLC and NSCLC. According to the CDC, cigarette smoking is linked to 80 to 90 percent of all lung cancer deaths in the United States. Other causes and risk factors include:
The first step in diagnosing lung cancer is a physical examination. If your doctor suspects lung cancer, they may recommend further testing. Testing includes:
Cancer may spread from the original tumor to other parts of the body. This is called metastasis. There are three ways this can happen:
A metastatic tumor that forms somewhere else in the body is the same type of cancer as the original tumor. The Tumor, Node, Metastasis (TNM) staging system for NSCLC is an internationally accepted system used to characterize the extent of disease. The TNM system combines features of the tumor into disease stage groups 1 to 4, with stage 4 being the most severe. TNM staging correlates with survival and are linked to recommendations for treatment. Earlier-stage cancers have a better outlook than later-stage cancers. Since SCLC is so aggressive, its staging is not based on traditional TNM stages. It’s staged and managed using a simplified system of clinical limited or clinical extensive disease. Treatment depends on many factors, including stage at diagnosis. If the cancer hasn’t spread, removing a part of the lungs may be a first step. Surgery, chemotherapy, and radiation may be used alone or in some combination. Other treatment options include laser therapy and photodynamic therapy. Other medications may be used to alleviate individual symptoms and side effects of treatment. Treatment is tailored to individual circumstances and may change accordingly. The outlook varies according to:
In general, survival rates are higher for earlier-stage (stage 1 and 2) lung cancers. Treatments are improving with time. Five-year survival rates are calculated based on people who’ve received treatment at least 5 years ago. The 5-year survival rates shown below may have improved as of current research. While SCLC is much more aggressive than NSCLC, finding and treating all lung cancers early is the best way to improve a person’s outlook. Which has better survival rates small cell or nonThe 5-year survival rate for NSCLC is 26%, compared to 7% for small cell lung cancer. However, it is important to note that survival rates depend on several factors, including the subtype of lung cancer and the stage of disease.
Which cancer spreads faster small cell or nonHowever, because small cell lung cancer typically grows and spreads to other parts of the body faster than non-small cell lung cancer, small cell lung cancer may also cause symptoms such as bone pain, confusion, seizures and paralysis.
What are the 3 types of lung cancer?The three main types are adenocarcinoma, squamous cell carcinoma and large cell carcinoma. They are grouped together because they behave in a similar way and respond to treatment in a similar way.
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