Cancer is one of the most feared diseases, and misinformation can make that fear even more difficult to manage. From believing that cancer always means death to worrying that a biopsy can spread the disease, many common misconceptions can influence important healthcare decisions.
In India, fear, social stigma and misunderstandings about cancer may prevent people from seeking medical advice when they need it.
The truth is that cancer is not one single disease. There are many types of cancer, and their causes, symptoms, treatment options and outcomes can differ significantly.
Understanding the facts can help patients and families make informed decisions, seek appropriate medical advice and avoid unnecessary delays in care.
Here are 10 common cancer myths—and the facts behind them.
Fact: Many cancers can be treated successfully, and some can be cured.
A cancer diagnosis can be frightening, but it does not automatically mean that a person will die from the disease.
The outlook depends on several factors, including the type of cancer, its stage, its biological characteristics, the patient's overall health and how the cancer responds to treatment.
Some cancers can be cured, particularly when detected at an early stage and treated appropriately. Other cancers may be controlled for extended periods with modern treatments.
Surgery, chemotherapy, radiotherapy, immunotherapy and targeted therapies may be used individually or in combination, depending on the diagnosis.
What you should do: Ask your treating doctor about your specific cancer, its stage, the treatment options available and the realistic goals of treatment. Avoid drawing conclusions from another person's experience because every diagnosis is different.
Fact: Cancer does not spread through ordinary contact with another person.
You cannot catch cancer by hugging someone, sharing food, sitting beside a patient or caring for a family member with cancer.
However, certain infections can increase the risk of developing specific cancers. For example, persistent infection with certain high-risk types of human papillomavirus (HPV) can cause cervical and some other cancers. Hepatitis B and C infections are associated with liver cancer.
This does not mean that cancer itself is contagious. It means that some infections associated with cancer risk can be transmitted between people.
What you should do: Support people living with cancer rather than isolating them. Discuss relevant vaccinations and infection-prevention measures with a healthcare professional.
Fact: Most cancers are not caused by inherited genetic changes.
Family history can influence cancer risk, but having no family history does not mean you cannot develop cancer.
Some people inherit genetic changes that increase their likelihood of developing particular cancers. In other cases, cancer develops because of genetic changes acquired during a person's lifetime, often through a combination of factors that cannot always be identified.
A family history may be particularly important when several relatives have related cancers or when a family member was diagnosed at an unusually young age.
What you should do: Tell your doctor about significant cancer diagnoses in your family. If your history suggests an inherited risk, genetic counselling may help determine whether additional assessment or preventive measures are appropriate.
Fact: A biopsy is an important diagnostic procedure, and the risk of tumour spread caused by a properly performed biopsy is extremely low for most procedures.
A biopsy involves collecting a sample of tissue so that it can be examined under a microscope. It often helps doctors confirm whether a suspicious growth is cancerous and identify the type of cancer.
Although the possibility of tumour seeding is considered for certain procedures and situations, fear of a biopsy should not lead someone to reject an investigation that their medical team considers necessary.
The appropriate biopsy technique depends on the suspected cancer, its location and the clinical circumstances.
What you should do: Ask why a biopsy is recommended, how it will be performed and what risks apply to your particular case. Your doctor can explain whether alternative diagnostic approaches are suitable.
Fact: Some cancers cause little or no pain, especially in their early stages.
Pain is not a reliable way to determine whether a lump or other abnormality is cancerous.
Many lumps are benign, meaning they are not cancer. However, some cancers can present as painless lumps or other changes that may initially seem harmless.
Depending on the location, other warning signs may include a persistent mouth ulcer, unusual bleeding, unexplained weight loss, a change in bowel habits or a persistent cough.
These symptoms can also have non-cancerous causes, but they should not be ignored if they persist or are unusual for you.
What you should do: Seek medical evaluation for a new or persistent lump or an unexplained change in your body. A clinical examination and, when indicated, further tests can help determine the cause.
Fact: Eliminating sugar from your diet has not been shown to cure cancer or make an existing cancer disappear.
Cancer cells use glucose for energy, but healthy cells also need glucose. Your body continues to supply glucose to essential tissues even when you stop eating sugary foods.
A balanced diet remains important during cancer treatment. Unnecessarily restrictive diets may make it harder to maintain adequate nutrition, especially for patients who are already experiencing appetite loss or weight changes.
This does not mean that dietary choices are irrelevant. Limiting excessive added sugar and maintaining a balanced diet can support overall health.
What you should do: Discuss nutrition with your treating team or a qualified dietitian, especially during surgery, chemotherapy or radiotherapy. Do not replace prescribed treatment with a restrictive diet.
Fact: No herbal product has been established as a reliable replacement for evidence-based cancer treatment.
Some complementary approaches may help certain patients manage symptoms or improve wellbeing. However, they should not be confused with treatments proven to control or cure a specific cancer.
Some herbal products and supplements can also interact with chemotherapy, targeted therapies, anaesthesia or other medicines.
Delaying recommended treatment while trying an unproven remedy can allow a cancer to progress and may reduce treatment options.
What you should do: Tell your oncologist about any herbs, supplements or alternative treatments you are considering. Never stop or postpone prescribed cancer treatment without discussing the decision with your treating team.
Fact: Surgery is an established treatment for many cancers and can be part of treatment with curative intent.
The purpose of cancer surgery is to remove a tumour when an operation is appropriate. Depending on the cancer, the surgeon may also need to remove nearby tissue or lymph nodes to achieve appropriate cancer control.
Surgery does not automatically cause cancer to spread. However, surgery is not suitable for every cancer or every stage of disease, and the treatment plan must be tailored to the individual patient.
For selected patients, minimally invasive or robotic-assisted surgery may be an option. In other situations, open surgery or non-surgical treatment may be more appropriate.
What you should do: Ask your surgical oncologist about the purpose of the proposed operation, the expected benefits, the risks and any suitable alternatives.
Fact: Emotional wellbeing matters, but positive thinking is not a substitute for medical treatment.
A cancer diagnosis can bring fear, sadness, uncertainty and stress. These are understandable reactions, and patients should not feel guilty for experiencing difficult emotions.
Emotional support, counselling, appropriate physical activity and connections with loved ones can help patients cope with the challenges of treatment.
However, there is no convincing evidence that maintaining a positive attitude alone can cure cancer or replace the need for appropriate treatment.
What you should do: Seek emotional and practical support when needed. Discuss anxiety, low mood, sleep difficulties or other concerns with your healthcare team.
Fact: Some cancers may cause few noticeable symptoms in their early stages.
Feeling well is encouraging, but it does not rule out every cancer.
The role of screening is to look for certain cancers or precancerous changes in people who may not yet have symptoms. Recommended screening depends on factors such as age, sex, family history, personal risk and established clinical guidance.
Screening is not the same as investigating symptoms. If you notice a persistent or unusual change, you may need medical assessment even if you are not due for a screening test.
Not everyone needs extensive scans or whole-body cancer testing. Unnecessary testing can lead to false alarms and avoidable procedures.
What you should do: Follow recommended screening guidance for your individual risk and consult a healthcare professional about persistent symptoms.
Consider seeking medical advice if you experience a persistent or unexplained change, such as:
These symptoms do not necessarily indicate cancer. They can have many causes, but appropriate evaluation can help identify the reason and determine whether further investigation is needed.
If cancer is suspected, your doctor may recommend an examination, imaging, laboratory tests, a biopsy or other investigations depending on the situation.
When faced with a possible or confirmed cancer diagnosis, reliable information is essential.
Consider these steps:
The right decision should be based on your diagnosis, clinical evidence, medical advice and personal circumstances—not fear or misinformation.
Some cancers can be cured, particularly when detected at an early stage and treated appropriately. Outcomes vary according to cancer type, stage, biology and response to treatment.
No. Treatment depends on the cancer and its clinical characteristics. Some patients may need surgery, radiotherapy, medication or a combination of treatments. Chemotherapy is not required in every case.
No lifestyle can eliminate cancer risk completely. Avoiding tobacco, limiting alcohol, maintaining a healthy weight, being physically active and following recommended vaccination and screening guidance can help reduce the risk of certain cancers.
A second opinion can be useful if you need clarification about your diagnosis, the proposed operation or alternative treatments. It is particularly worth discussing when the decision is complex or you remain uncertain about your options.
No. Many lumps are benign, but a new or persistent lump should be assessed by a healthcare professional rather than diagnosed at home.
Cancer myths can create unnecessary anxiety, encourage unproven treatments and delay appropriate medical care.
The best way to counter misinformation is to ask questions, seek reliable medical information and discuss concerns openly with qualified healthcare professionals.
Cancer is not always a death sentence. It is not contagious through ordinary contact, and a biopsy or operation does not automatically make it spread. At the same time, no single diet, supplement or positive mindset can replace appropriate cancer treatment.
Awareness is not about living in fear. It is about recognising the facts, acting when necessary and making informed healthcare decisions.
If you or a family member has a persistent symptom or a cancer diagnosis, consult a qualified medical professional to understand the next appropriate step.
Dr. Nitin Singhal is a surgical oncologist in Ahmedabad, Gujarat. Patients seeking advice about cancer surgery should consult a qualified specialist to understand the treatment options appropriate to their diagnosis.
Website: https://drnitinsinghal.com/
Medical disclaimer: This article is intended for general educational purposes only. It does not replace individual medical advice, diagnosis or treatment. Always consult your healthcare professional for guidance specific to your medical condition.
