Lung cancer: symptoms, identification, and treatment.

Lung cancer: symptoms, identification, and treatment.

Oncology |by Dr. Indranil Khan| Published on 28/10/2024

Lung cancer was accountable for 18% of all cancer-related deaths globally in 2020. Thus, there is a need to know about lung cancer, its risk factors, common signs of lung cancer, the existing treatments and how one can prevent it. If you're experiencing any such problem, don't ignore it. Contact our best Oncologist at CMRI Hospital, Kolkata today for expert consultation and treatment.In this blog, we will focus on some important aspects. So, let’s start and let’s see more about this.

What is lung cancer?

Lung cancer is a disease that occurs when there is an uncontrollable growth of abnormal cells in the lungs, causing damage to the healthy lung cells. These abnormal cells turn into malignant tumours and start to interfere with normal lung function. Cancerous cells in the lungs tend to spread to other parts of the body, including the brain and bones. Early detection is the key that improves the success and survival rate. 

There are two main types of lung cancer:

  • Non-small cell lung cancer is the most common type of lung cancer. It is responsible for about 85% of cases. It begins in the tissues of the lungs.
  • Small cell lung cancer is less common, however, it tends to grow and spread faster than non-small cell lung cancer. It generally starts in breathing tubes known as bronchi and grows quickly. It is mostly associated with smoking. 

Symptoms of Lung Cancer 

Early recognition of lung cancer symptoms can prove to be helpful in its effective treatment.

Consult your doctor if these symptoms are persistent for a long time. 

Causes of Lung Cancer 

There are several factors that can cause lung cancer; however, some of the common and significant ones are: 

  • In a report by NCBI, Smoking is the leading cause of lung cancer, accounting for approximately 85% of cases. The risk increases with the number of cigarettes smoked. 
  • Secondhand smoke which means getting exposure to tobacco smoke from others can also increase risk.
  • Environmental factors such as prolonged exposure to radon gas, asbestos, or other harmful substances can contribute to lung cancer risk.
  • Family history may play a role, as some genetic mutations can increase susceptibility to lung cancer.

Risk Factors of Lung Cancer

While smoking remains the lead cause of lung cancer, other risk factors may include: 

Risk factor

How does it impact? 

Age

Most lung cancer cases usually occur in individuals over 65 years but this may not be the case every time. 

Gender

Men are more likely to develop lung cancer than women, although this gap is narrowing.

Pre-existing lung conditions

Conditions like COPD (chronic obstructive pulmonary disease) can increase risk.

Occupational exposures

Jobs that expose individuals to harmful chemicals or materials can increase the risk.

Lung Cancer Diagnosis Process 

The diagnosis process of lung cancer involves multiple stages. 

Early detection and a proactive approach can lead to successful outcomes. Feel free to reach out for expert advice at CMRI. Our team will provide you end-to-end guidance for your concerns and queries.

FAQs

 

What is the survival rate of lung cancer?

  • Survival rates can vary significantly depending on the stage at which the cancer is diagnosed. 
  • The five-year survival rate for localised lung cancer (confined to the lungs) may be as high as 56%. However, for advanced stages, the rate drops considerably.

Is lung cancer curable? 

  • While lung cancer can be treated, especially in its early stages, the word ‘cure’ is often avoided by the experts. 
  • Treatments such as surgery, chemotherapy, radiation therapy, and targeted therapies can treat the disease.
  • If there is no evidence of disease for 5 years or more after the treatment, then the person might be considered cured. 

What are the four stages of lung cancer?

Lung cancer is classified into four stages based on its progression:

  • Stage I: Cancer is localised within the lungs and has not spread.
  • Stage II: Cancer may have spread to nearby lymph nodes.
  • Stage III: Cancer has spread to lymph nodes in the middle of the chest.
  • Stage IV: Cancer has spread to other parts of the body, such as the liver, bones, or brain.

Can lung cancer be prevented?

While not all cases of lung cancer can be prevented, several strategies can reduce risk, including:

  • Quitting smoking: This is the most effective way to lower the risk.
  • Avoiding secondhand smoke: Staying away from environments where smoking occurs can help.
  • Regular screenings: For those at high risk, regular screenings can help detect lung cancer early when it is most treatable.

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