The moment we hear about lung cancer cases, we associate them mostly with smoking. While tobacco use continues to be the primary concern here globally, an increasing number of cases involve nonsmokers. Lung cancer in nonsmokers is becoming widely acknowledged as a separate health concern with its own causes, traits, et al.
Around 10%-20% of lung cancer cases are in non-smokers. Awareness of symptoms, risk factor awareness, timely diagnosis, timely treatments, etc., are vital to better health and survival. Lung cancer treatment in Siliguri or elsewhere depends on multiple factors, from its stage to the general health of the patient and further.
Many people who have been diagnosed with lung cancer have never smoked a cigarette; yes, this is possible. Understanding why lung cancer develops in non-smokers is essential for early lung cancer detection, effective treatment, and better awareness.
What Is Lung Cancer in Non-Smokers?
A person who has smoked fewer than 100 cigarettes in their lifetime is commonly referred to as a non-smoker. The term "lung cancer in non-smokers" is basically used to describe lung cancer that strikes these people.
Researchers now understand that lung cancer in nonsmokers can differ from lung cancer associated with smoking in many ways, and these include:
- Mutations in genes
- Features of the tumour
- Reaction to therapy
- Patient demographics
Lung cancer in nonsmokers is even regarded by many specialists as a separate disease subtype.
How Frequently Do Non-Smokers Get Lung Cancer?
Studies indicate that between 10% and 20% of lung cancer occurrences occur in those who have never smoked. However, there’s no doubt that smoking is the primary cause of lung cancer instances and fatalities.
Lung cancer is one of the top causes of cancer-related fatalities globally. Despite having never smoked, women, especially those of Asian descent, seem to be disproportionately impacted by lung cancer.
But regardless of age, gender, or race, this concerning illness can strike anyone.
What Leads to Lung Cancer in Humans
Lung cancer in nonsmokers is often associated with a confluence of underlying medical disorders. This also includes genetic factors and environmental exposures.
Radon Inhalation
It is a naturally occurring radioactive gas. Radon is created when uranium breaks down in rocks and soil, which can enter houses through floor, wall, and foundation cracks.
People may be exposed to radon without realizing it. This is because radon gas is odourless and colourless, and long-term exposure raises the risk of lung cancer and damages lung tissue.
Second-hand Smoke
No doubt, regular exposure to second-hand smoke can greatly raise the risk of lung cancer, including the risk for various health concerns.
You should know that there are thousands of compounds in second-hand smoke. Many of which are known to cause cancer, and exposure might happen in public spaces, at work, or even at home.
Long-term exposure to smokers increases can put you at risk of lung cancer and respiratory illnesses. This can put children and older adults at different types of health risks as well.
Did you know that in many nations, radon is the most common cause of lung cancer among nonsmokers and the second most common cause after smoking?
Air Pollution
Among nonsmokers, air pollution has been identified as a major cause here, and typical sources are:
- Emissions from vehicles
- Pollution from industry
- Power plants
- Wildfires
- Fuels used for household combustion
Tiny airborne particles can deeply and easily enter the lungs. They produce cellular damage and inflammation that may ultimately result in DNA changes leading to cancer.
People living in cities more often have greater exposure levels for sure, which raises their long-term health concerns.
.jpg)
Occupational Risks
People are exposed to chemicals that cause cancer in some job conditions, and some of the examples are:
- Dust from asbestos and silica
- Diesel exhaust
- Compounds of arsenic, chromium, and nickel
Workers in the manufacturing, mining, construction, and industrial industries may be exposed to these dangerous substances. And, this can happen for extended periods of time, which increases the risk.
Using protective gear and adhering to workplace safety regulations can help lower risk.
Genetic Factors
In many cases of lung cancer among nonsmokers in the world, genetics is a major factor. Researchers have discovered multiple genetic alterations that are frequently present in patients who do not smoke, and these include:
- Mutations in EGFR
- ALK reorganizations
- Mutations in ROS1
- Changes in HER2
Even when there is no tobacco exposure, these changes can promote the growth of cancer.
Susceptibility may also be high here if there’s a family history of lung cancer (especially in a first-degree relative).
Prior Lung/ Respiratory Conditions
Cancer risk may be high with some long-term lung diseases, and among them are:
- Pulmonary fibrosis
- Tuberculosis
- COPD, or chronic obstructive pulmonary disease
- Lung infections that recur / pneumonia
Cancerous cells may arise as a result of long-term lung tissue inflammation and scarring.
Indoor Air Pollution
Though it is often skipped or overlooked, indoor pollution can be a significant risk factor here, and sources could be:
- Burning biomass fuel
- Stoves made of wood
- Appliances that burn coal
- Inadequate ventilation
- Fumes from cooking in an enclosed area
In certain areas, non-smokers who are exposed to indoor smoke from cooking and heating for a long time have higher incidences of lung cancer.
Let’s Talk About Lung Cancer Symptoms in Non-Smokers
The fact that symptoms of lung cancer usually don't show up until the disease has advanced is one of the main concerns here.
Common signs and symptoms you must know include:
Chronic Coughing
A medical professional should be seen if you notice a cough that does not get better after a few weeks (even after three weeks).
Breathlessness
Breathing difficulties during routine tasks could be a sign of a lung issue.
Pain in the Chest
Tumours that impact surrounding tissues may cause chronic chest pain or discomfort; these signs are very common in other health concerns.
Coughing Up Blood
Sputum containing even tiny amounts of blood needs medical attention, and coughing up blood is what you should never ignore.
Fatigue
Lung cancer is one of many tumors that frequently manifest as unexplained fatigue and weakness (not very common initially).
Unexplained Loss of Weight
Losing weight without making dietary or exercise modifications can be a warning sign. Do see your healthcare provider for medical diagnosis without delay.
Recurrent Respiratory Infections
An underlying lung problem may show symptoms like recurrent episodes of pneumonia or bronchitis.
In nonsmokers, diagnosis might occasionally be delayed. This is simply because these symptoms can mimic common respiratory conditions.
The concerning part is that this disease in its early stages frequently has little or no symptoms. Because of this, many cases are only found after lung cancer has spread.
When found/ diagnosed early:
- There are many possibilities for better treatment
- Improvements in survival rates
- Surgery can be an option
- Life quality is frequently higher
If one has high lung cancer risk factors, they should talk to their healthcare providers about screening alternatives.
Lung Cancer Types Found in Non-Smokers More Commonly
Non-small cell lung cancer/ NSCLC is the most common type of lung cancer among nonsmokers, and adenocarcinoma is the most common subtype of NSCLC.
Even people without a history of tobacco smoking may develop adenocarcinoma, and this often occurs in the outer areas of the lungs.
Options for Treatment
Many factors, such as the stage of the malignancy, general health, and hereditary traits, influence lung cancer treatment.
Surgery
Surgery may be used to remove the tumor and surrounding tissue when cancer is discovered early.
In some situations, this may be therapeutic.
Radiation Treatment
High-energy beams are used by radiation to kill cancer cells, which can be applied either on its own or with other therapies or surgery.
Chemotherapy
Chemotherapy is again an effective lung cancer treatment that uses drugs that target cancer cells that divide quickly.
Targeted Therapy
Lung cancer treatment for many lung cancer patients who do not smoke has been transformed by targeted medicines.
These drugs/ meds minimize harm to healthy cells while targeting cancer cells with precise genetic abnormalities.
This treatment for lung cancer often has a major positive impact on patients with EGFR, ALK, ROS1, or other actionable mutations. Get expert advice on personalized lung cancer treatment in Siliguri at Hope and Heal.
Immunotherapy
The body's immune system can identify cancer and combat cancer cells in the lungs and cancer spread with the aid of immunotherapy.
It can enhance survival rates and provide long-term disease control for some patients.
Is It Possible to Prevent Lung Cancer in Never-Smokers?
While it is not possible to avoid every instance, there are numerous ways to lower the risk of lung cancer among non-smokers.
Radon Testing in Homes
Radon testing tools can detect high levels within homes and are generally accessible.
Avoid Secondhand Smoke
Setting smoke-free surroundings safeguards both adults and children.
Boost the Quality of Indoor Air
Cleaner cooking techniques and adequate ventilation are a must, especially for people who cook, which can lower exposure to dangerous pollutants.
Observe Workplace Safety Regulations
Exposure to carcinogens can be low with wearing protective gear and following workplace safety guidelines.
Cut Down on Air Pollution Exposure
Reducing outdoor activities during times of poor air quality can be of great help, as it may help lower health risk to some extent.
Maintain Overall Lung Health
Healthy lifestyle habits support lung function, cardiac health, hormones, and general well-being.
These include:
- Regular exercise
- Balanced nutrition
- Avoiding environmental toxins
- Managing chronic respiratory conditions
Final Words
Lung cancer in nonsmokers is a developing health concern. We must know that non-smokers can also develop cancer, even though smoking is still the biggest risk factor for the illness overall.
Exposure to radon, air pollution, secondhand smoke, occupational hazards, genetic mutations, and chronic lung diseases are the top contributing factors for non-smokers. Early diagnosis and more successful treatment are possible with better awareness of these dangers.
See one of the top doctors for lung cancer treatment in Siliguri or near you and receive personalized attention and support for optimal palliative care.
