Lung cancer is a serious cancer disease of lungs which can be results from an abnormality in the body’s basic unit of life and the uncontrolled cell growth in tissues of the lung. Well, it has been noted that around 1.3 million worldwide populations is suffering with this major disease and cause death every year. Now let us discuss the causes, types and symptoms of this disease.
Causes of Lung cancer:
- Lung Cancer is the ultimately the result of cells that uncontrollably grow and do not die. It causes with many reasons such as number of cigarettes smoked and the time over which smoking has occurred; doctors refer to this risk in terms of pack-years of smoking history.
- Passive smoking or the inhalation of tobacco smoke by non-smokers who share living or working quarters with smokers etc.
- The presence of certain diseases of the lung, notably chronic obstructive pulmonary disease (COPD), is associated with an increased risk of Lung Cancer.
Types of Lung Cancer:
However, Lung cancers can also known as bronchogenic carcinomas which are broadly classified into two types such as:
- Small cell lung cancers (SCLC): SCLC accounts for about 20% of all lung cancers. Although the cells are small, they multiply quickly and form large tumors that can spread throughout the body.
- Non-small cell lung cancers (NSCLC): NSCLC accounts for about 80% of lung cancers. There are different types of NSCLC such as Squamous cell carcinoma (also called epidermoid carcinoma), Adenocarcinoma, Bronchioalveolar carcinoma and Large-cell undifferentiated carcinoma etc.
Symptoms of Lung Cancer:
- A new cough in a smoker or a past smoker should raise concern for lung cancer.
- Chest pain is a symptom in about one fourth of people with lung cancer. This chest pain may be is dull, aching, and persistent and may involve other structures surrounding the lung.
- Shortness of breath usually results from a blockage in part of the lung, collection of fluid around the lung or the spread of tumor through the lungs.
- Wheezing or Hoarseness may signal blockage or inflammation in the lungs that may go along with cancer.
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