Cancer is a class of diseases characterized by out of control cell growth. Lung cancer occurs when this uncontrolled cell growth begins in one or both lungs. The lungs are two large spongy organs located inside the chest cavity. Lung cancer occurs most often in adults between the ages of 40 and 70 who have smoked cigarettes for at least 20 years. There are different types of lung cancer, depending on which cells are affected.
1. Small
cell carcinoma around 15 per cent is small cell carcinomas.
This type of cancer spreads early
and shows few early symptoms.
2.
Non-small cell carcinoma these cancers affect the cells that line the main bronchi.
Some lung
tumours are metastatic from cancers elsewhere in the body. The lungs are a
common site for metastasis. Since lung cancer tends to spread or metastasize
very early in its course, it is a very life-threatening cancer and one of the
most difficult cancers to treat. While lung cancer can spread to any organ in
the body.
Warning
signs of lung cancer are not always present or easy to identify. Lung cancer
symptoms may take years before appearing, usually after the disease is in an
advanced stage. Below is
the following symptoms of lung cancer including:
3.
Breathlessness and swallowing
4.
Recurring pneumonia or chest infections
5.
Wheezing or hoarseness may signal blockage
6.
Unexplained weight loss
Lung
cancer is categorized into stages according to its spread. The treatments also
depend on the type of cancer, age, health status and additional personal
characteristics. As there is usually no single treatment for cancer, patients
often receive a combination of therapies and palliative care. Although the
diagnostic techniques provided important information, extracting cancer cells and
looking at them under a microscope is the only absolute way to diagnose lung
cancer. This procedure is called a biopsy. If the biopsy confirms lung cancer,
a pathologist will determine whether it is non-small cell or small cell.
Small
cell lung cancer has two stages which are:
1. In the
limited stage, the tumor exists in one lung and in nearby lymph nodes.
2. In the
extensive stage, the tumor has infected the other lung as well as other organs
in the body.
For
non-small cell lung cancer, these stages are labelled from I to IV. The lower
numbers indicate earlier stages where the cancer has spread less:
2. Stage
II is when the cancer has spread to the lymph nodes surrounding the infected
lung.
3. Stage
III is when the cancer has spread to lymph nodes around the trachea, chest wall
and diaphragm on the same side as the infected lung.
4. Stage
IV is when the cancer has spread to lymph nodes on the other lung or in the
neck.
5. Stage
IV is when the cancer has spread throughout the rest of the body and other
parts of the lungs.
As with
most cancers, the results are best if the cancer is diagnosed in its earliest
stages. However, some lung cancers aren't diagnosed until they are quite
advanced. Treatment may then be limited to easing the symptoms. Treatment
decisions depend on whether SCLC or NSCLC. Treatment options include:
1.
Chemotherapy is an anti cancer drugs are given to stop cancer cells from
multiplying. This treatment is most effective for small cell carcinoma.
2.
Surgery to remove the affected part of the lung or an entire lung. This offers
the best chance of cure if the cancer has not spread beyond the lungs.
3.
Radiotherapy use of x-rays to target and kill cancer cells. It may be used
against some early stage lung cancers and to stop cancer in the lymph nodes
from spreading further.
5.
Clinical trials are a participation in a clinical trial that investigates the
safety and effectiveness of novel drugs may be offered.
If you
are a current tobacco user, quitting can still greatly reduce your chances of
getting cancer. Many products such as nicotine gum, nicotine sprays, and
nicotine inhalers have been successfully used to help people trying to quit
smoking.
There are
common causes of lung cancer:
2. Cigar
and pipe smoking increases the risk of lung cancer but not as much as smoking
cigarettes.
3.
Asbestos fibbers are silicate fibbers that can persist for a lifetime in lung
tissue following exposure to asbestos.
4. Radon gas is a natural chemically
inert gas that is a natural decay product of uranium.
5. Air pollution from
vehicles, industry, and power plants can raise the likelihood of developing
lung cancer in exposed individuals.
Screening
techniques are designed to find cancer at the earliest stage so that the most
treatment options are available. This cancer is detected in the late stages of
the disease after they have spread and are harder to treat. Possible lung
cancer screening tests include analysis of sputum cells, fibrotic examination
of bronchial passages and low-dose spiral CT scans.
Cancer
and cancer treatments can make a person feel too tired to exercise. Regular
exercise improves functioning of the immune system and may increase survival
rates in some cases.
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