Return to Search
EN
Lung cancer arises when cells in the lung grow and multiply uncontrollably, forming masses that can invade and damage surrounding tissues. Lung cancers are broadly classified into two main types based on their cellular characteristics observed under a microscope: Non-Small Cell Lung Cancer (NSCLC) and Small Cell Lung Cancer (SCLC).
Non-Small Cell Lung Cancer (NSCLC)
This is the most common type of lung cancer, encompassing several subtypes. These subtypes differ in their cellular appearance, growth patterns, and propensity for metastasis. The classification is determined by microscopic examination of cancer tissue. The main subtypes include:
* Squamous Cell Carcinoma: Originates from squamous cells, which are flat, thin cells lining the airways. Also known as epidermoid carcinoma.
* Adenocarcinoma: Develops from glandular cells that produce mucus and other substances.
* Large Cell Carcinoma: Characterized by large, abnormal cells when viewed under a microscope. This is a less common and often fast-growing type.
* Adenosquamous Carcinoma: A rare type that exhibits features of both adenocarcinoma and squamous cell carcinoma.
* Pleomorphic, Sarcomatoid, or Sarcomatous Carcinoma: A group of rare and aggressive cancers characterized by diverse cell types with features resembling sarcoma.
Small Cell Lung Cancer (SCLC)
Comprising approximately 15% of all lung cancer cases, SCLC is strongly associated with smoking. It is known for its rapid growth and tendency to spread quickly throughout the body via the lymphatic system and bloodstream compared to NSCLC.
Carcinoid Tumor
These are a distinct and relatively rare type of lung tumor that originates from neuroendocrine cells. They are generally slow-growing.
What are the types of lung cancer?
Non-Small Cell Lung Cancer (NSCLC)
This is the most common type of lung cancer, encompassing several subtypes. These subtypes differ in their cellular appearance, growth patterns, and propensity for metastasis. The classification is determined by microscopic examination of cancer tissue. The main subtypes include:
* Squamous Cell Carcinoma: Originates from squamous cells, which are flat, thin cells lining the airways. Also known as epidermoid carcinoma.
* Adenocarcinoma: Develops from glandular cells that produce mucus and other substances.
* Large Cell Carcinoma: Characterized by large, abnormal cells when viewed under a microscope. This is a less common and often fast-growing type.
* Adenosquamous Carcinoma: A rare type that exhibits features of both adenocarcinoma and squamous cell carcinoma.
* Pleomorphic, Sarcomatoid, or Sarcomatous Carcinoma: A group of rare and aggressive cancers characterized by diverse cell types with features resembling sarcoma.
Small Cell Lung Cancer (SCLC)
Comprising approximately 15% of all lung cancer cases, SCLC is strongly associated with smoking. It is known for its rapid growth and tendency to spread quickly throughout the body via the lymphatic system and bloodstream compared to NSCLC.
Carcinoid Tumor
These are a distinct and relatively rare type of lung tumor that originates from neuroendocrine cells. They are generally slow-growing.