Lung cancer related to smoking
Lung cancers, also known as bronchogenic ("carcinoma" is another term for ), are broadly classified into two types: small cell lung cancers (SCLC) and non-small cell lung cancers (NSCLC). This classification is based upon the microscopic appearance of the tumor cells. These two types of cancers grow, spread, and are treated in different ways, so a distinction between these two types is important.
SCLC comprises about 10%-15% of lung cancers. This type of lung cancer is the most aggressive and rapidly growing of all the types. SCLC is strongly related to cigarette . SCLCs metastasize rapidly to many sites within the body and are most often discovered after they have spread extensively.
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Exactly what kind of lung cancer do I have? Where is the cancer located and how far has it spread? What stage is my cancer? What are my chances for recovery? Can you remove my lung cancer with surgery? How will the surgery affect my breathing or quality of life? Will I need chemotherapy or radiation? What are the goals for these lung cancer treatments, and what is my prognosis? What are my treatment choices, and what do they mean for me long-term? What side effects do...
NSCLC is the most common, accounting for about 85% of all cases. NSCLC has three main types designated by the type of cells found in the tumor. They are:
- Adenocarcinomas are the most common type of NSCLC in the U.S. and comprise up to 40% of cases. While adenocarcinomas are associated with smoking like other lung cancers, this type is also seen in non-smokers - especially women - who develop lung cancer. Most adenocarcinomas arise in the outer, or peripheral, areas of the lungs. They also have a tendency to spread to the lymph nodes and beyond. in situ (previously called bronchioloalveolar carcinoma) is a subtype of adenocarcinoma that frequently develops at multiple sites in the and spreads along the preexisting alveolar walls. It may also look like pneumonia on a chest X-ray. It is increasing in frequency and is more common in women. People with this type of lung cancer tend to have a better prognosis than those with other .
- Squamous cell carcinomas were formerly more common than adenocarcinomas; today, they account for about 25% to 30% of all lung cancer cases. Also known as epidermoid carcinomas, squamous cell cancers arise most frequently in the central chest area in the bronchi. This type of lung cancer most often stays within the lung, spreads to lymph nodes, and grows quite large, forming a cavity.
- Large cell carcinomas, sometimes referred to as undifferentiated carcinomas, are the least common type of NSCLC, accounting for 10%-15% of all lung cancers. This type of has a high tendency to spread to the lymph nodes and distant sites.