By Dr. Pranav Chadha, Consultant, Radiation Oncology and Stereotactic Radiotherapy/Radiosurgery, Kokilaben Dhirubhai Ambani Hospital, Mumbai
Cancer is one among the major killers in India. Its incidence and prevalence are gradually increasing in the country. Many factors are implicated in this growth, which include lifestyle changes, environmental factors, genetic predisposition, and lack of awareness about early detection. In itself prevention still continues to be an important tool in reducing the burden of cancer, even if treatment has improved survival rates.
Below are the ten most common cancers in India, categorized by gender, along with their primary causes.
Most Common Cancers in Men
1. Oral Cancer: India has one of the highest rates of oral cancer in the world, primarily due to tobacco consumption. It is more common in men, especially those who chew tobacco or smoke.
Causes:
- Tobacco chewing (gutkha, betel quid, khaini, pan masala)
- Smoking (cigarettes, bidis, hookah)
- Excessive alcohol consumption
- Poor oral hygiene and chronic irritation from ill-fitting dentures
- HPV infection (human papillomavirus)
2. Lung Cancer: Lung cancer is one of the most deadly forms of cancers globally. In India, though smoking prevails as the major reason, pollution and occupational hazards as well contribute.
Causes:
- Smoking (active as well as passive exposure)
- Air pollution (vehicle emissions, industrial pollutants)
- Occupational exposure to asbestos, radon, and other carcinogens
- COPD-type chronic lung diseases
3. Stomach Cancer: Stomach cancer is prevalent in India, especially in regions with high salt consumption and poor food preservation practices. It is often detected at later stages, making treatment difficult.
Causes:
- Diet high in salt, processed, and smoked foods
- H. pylori bacterial infection, which leads to chronic inflammation
- Excessive alcohol consumption
- Tobacco use
- Chronic acid reflux (GERD) and gastritis
4. Colorectal Cancer (Large Intestine Cancer): Colorectal cancer is on a rise in India because of changing dietary and lifestyle habits, especially in urban populations.
Causes:
- Diet low in fiber and high in processed or red meats
- Sedentary lifestyle that leads to obesity
- Genetic predisposition and family history of colorectal cancer
- Chronic inflammatory bowel diseases, like Crohn’s disease and ulcerative colitis
5. Throat Cancer (Pharyngeal Cancer): Throat cancer is comprised of cancers of the pharynx and larynx and is highly associated with tobacco and alcohol consumption.
Causes:
- Use of tobacco in smoking or chewing
- Heavy drinking
- HPV infection
- Air pollution and exposure to industrial chemicals
6. Prostate Cancer: Prostate cancer in India is the second most prevalent cancer found in men, especially after age 50. In patients with early detection, the chances of survival are significantly better.
Causes:
- Age (risk increases after 50)
- Hormonal disturbances (high testosterone levels)
- High-fat diet and obesity
- Genetic predisposition and family history
Most Common Cancers in Women
7. Breast Cancer: Breast cancer is now the most common cancer in women in India, surpassing cervical cancer. Detrimental lifestyle changes and delay in childbearing are responsible for this increase.
Causes:
- Obesity and lack of physical activity
- Late childbirth or not breastfeeding
- Hormonal changes due to prolonged use of oral contraceptives
- A diet rich in fat and processed foods
- Family history and genetic mutations (BRCA1 & BRCA2 genes)
8. Cervical Cancer: Formerly the most prevalent cancer among Indian women, cervical cancer cases have waned gradually, thanks to successful awareness and vaccination programs; nevertheless, it remains a cause of great health
Causes:
- Persistent HPV infection
- Multiple pregnancies and early childbirth
- Poor hygiene of the genital tract
- Lack of regular pap smear screening
9. Ovarian Cancer: Due to vague symptoms, ovarian cancer often gets diagnosed in advanced stages whilst treatment becomes difficult.
Causes:
- Family history and genetic mutations (BRCA1 & BRCA2 genes)
- Hormonal disturbances
- Post-menopausal hormone replacement therapy
- Smoking and alcoholism
10. Colorectal Cancer (Large Intestine Cancer): As it is among men, colorectal cancer is on the rise in Indian women, too, on account of dietary and lifestyle changes.
Causes:
- Diet rich in red and processed meats and low in fiber
- Genetic predisposition
- Chronic inflammatory bowel conditions
Key Takeaways for Cancer Prevention
- Avoid Tobacco and Alcohol: Tobacco and alcohol are significant catalysts of oral, throat, lung, and stomach cancers. This means quitting or reducing these habits will greatly diminish your risk for cancer.
- Adopt a Healthy Diet: Eating a well-balanced diet rich in fiber, fresh fruits, and vegetables; minimize your intake of processed foods, high-fat diet, and salt to help reduce the risk of colorectal, breast, and stomach cancers.
- Stay Physically Active: Get fit; obesity is a risk factor for various malignancies, including breast, colorectal, and prostate cancer. Thus, it is beneficial to stay fit in order to allow some form of exercise that will maintain a healthy weight.
- Have Screening Done Regularly: Early detection is most important for survival rates. Women should get regular Pap smears for cervical cancer, mammograms for breast cancer, and colonoscopy for colorectal cancer.
- Be Aware of Genetic Risks: If you come from a family history of cancers, your risk is elevated. Genetic counseling and regular check-in could help with an early diagnosis and measures to prevent cancer.
- Safe Hygiene Practices: Personal hygiene regarding the genitals can prevent one from cervical and ovarian cancers; regular gynecological check-ups are life-saving.
While lifestyle changes and early detection are important, the ultimate goal is the development of effective cancer vaccines that will either prevent or dramatically reduce the risk of almost all cancers. The success of the HPV vaccine in the prevention of cervical cancer is a good step in this direction. Future vaccines for other cancers would represent great hope and a move toward a society devoid of high cancer rates.
Cancer is becoming a bigger health crisis in India. Increased awareness, lifestyle changes, and changes in medicine can cut back on its very potent effects. A person can easily avoid cancer and raise their odds of early detection and treatment just by adopting healthier living habits and appropriate screens.
FAQs for Most Common Cancer Causes in India
Q1. What causes cancer in India the most?
Tobacco use, alcohol consumption, poor diet, obesity, air pollution, and genetic factors are the leading causes of cancer in India. Tobacco alone contributes to over one-third of cancer cases, especially oral, throat, and lung cancers.
Q2. Which cancer is most common among men in India?
Among Indian men, oral cancer ranks as the most common type, primarily due to chewing tobacco, smoking, and poor oral hygiene. Lung and stomach cancers also have a high prevalence in men.
Q3. Which cancer is most common among women in India?
Breast cancer is currently the most common cancer among Indian women, followed by cervical and ovarian cancers. Delayed childbirth, obesity, and hormonal factors contribute to the rising incidence.
Q4. Can lifestyle changes help prevent cancer?
Yes. Avoiding tobacco and alcohol, maintaining a balanced diet, exercising regularly, and going for routine health screenings can significantly reduce cancer risk and improve early detection chances
