Understanding Cancer and Its Causes by Dr Deepak Nain

Cancer is a complex and multifaceted disease that has been the subject of extensive research and study. In order to better understand its causes and how to prevent it, it is crucial to first grasp the basic concepts and mechanisms behind its development. Dr. Deepak Nain, Cancer Suregon in Hisar’s Sapra Multispecialty Hospital is providing comprehensive information into the various aspects of cancer, from its genetic and environmental origins to the risk factors that contribute to its development.

What is Cancer?

Cancer refers to a group of diseases characterized by the uncontrolled growth and spread of abnormal cells. These cells can invade and destroy healthy tissue, resulting in the formation of tumors or the spread of cancerous cells to other parts of the body. Dr. Deepak Nain informed, “The development of cancer is often a complex process involving multiple factors, such as genetic mutations, environmental exposures, and lifestyle choices”.

The Role of Genetics in Cancer

One of the key factors in the development of cancer is genetic mutations. These mutations can either be inherited from one’s parents or acquired during a person’s lifetime. Over 90% of cancers are observed to have some type of genetic alteration.

Some individuals may inherit a genetic predisposition to cancer, while others may acquire mutations through exposure to environmental factors or simply by chance.

Environmental Factors and Cancer

In addition to genetic factors, environmental exposures can play a significant role in the development of cancer. These exposures can include:

  • Lifestyle factors: Smoking, excessive alcohol consumption, poor diet, and lack of physical activity can all increase the risk of developing certain types of cancer.
  • Exposure to harmful chemicals: Prolonged exposure to toxic chemicals, such as asbestos or benzene, can increase the risk of developing cancer.
  • Exposure to radiation: Exposure to high levels of ionizing radiation, such as that produced by nuclear materials or medical imaging procedures, can increase the risk of cancer.
  • Infections: Certain viral infections, such as human papillomavirus (HPV) and hepatitis B, have been linked to an increased risk of developing specific types of cancer.

Understanding the role of these environmental factors in cancer development is crucial for identifying ways to reduce one’s risk and improve overall health.

Cancer Risk Factors

A risk factor is anything that increases a person’s likelihood of developing a disease. While not all risk factors cause cancer directly, they can make the body more susceptible to the development of the disease. Some of the most common risk factors for cancer include:


The risk of developing cancer increases with age, as the accumulation of genetic mutations and exposure to environmental factors over time can increase the likelihood of developing the disease. Most cancers are diagnosed in individuals over the age of 65; however, cancer can occur at any age.

Lifestyle Choices

Certain lifestyle choices can significantly impact an individual’s risk of developing cancer. Some of these choices include:

  • Smoking: Smoking is the leading cause of preventable cancer and is responsible for a large proportion of lung cancer cases.
  • Diet: A diet high in processed meats, unhealthy fats, and added sugars can increase the risk of developing cancer. A diet rich in fruits, vegetables, whole grains, and lean proteins can help reduce this risk.
  • Physical activity: Engaging in regular physical activity can help maintain a healthy weight and reduce the risk of cancer. Aim for at least 30 minutes of moderate exercise most days of the week.
  • Alcohol consumption: Excessive alcohol consumption can increase the risk of several types of cancer, including liver, breast, and colorectal cancer. Limiting alcohol intake to moderate levels can help reduce this risk.

Family History and Inherited Genetic Mutations

A family history of cancer can indicate an increased risk of developing the disease due to inherited genetic mutations. In some cases, these mutations can significantly increase the likelihood of developing specific types of cancer. Genetic testing can help identify individuals with inherited mutations and guide appropriate preventive measures.

Chronic Health Conditions

Some chronic health conditions, such as ulcerative colitis or human immunodeficiency virus (HIV) infection, can increase the risk of developing certain cancers. Managing these conditions and working with a healthcare professional to monitor one’s risk can help reduce the likelihood of developing cancer.

Environmental Exposures

Exposure to harmful environmental factors, such as toxic chemicals or radiation, can increase the risk of developing cancer. Minimizing exposure to these factors and taking appropriate precautions, such as using protective equipment or limiting time spent in high-risk areas, can help reduce this risk.

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