Cancer is a group of diseases that begin when some cells in the body start to grow and multiply in an abnormal or uncontrolled way. These abnormal cells can form a tumour (a lump of tissue) that may damage nearby healthy tissues. In some cases, this uncontrolled cell growth can spread to other parts of the body, a process known as metastasis.
Even with major advancements in medical care, cancer remains a significant global health concern. Many people do not realise they are at risk and often overlook the early signs of cancer. Understanding how cancer develops, what causes it, and how it can be managed is the first step towards better awareness and timely care.
In this blog, we will share some crucial information about cancer to help you better understand what cancer is and how it affects the body.
How Does Cancer Develop?
Our bodies are made up of tiny building blocks called cells. Inside every cell is DNA, which contains genes that act as instructions for how the cell grows, divides, and repairs itself. Sometimes, changes in the DNA, known as mutations, occur.
These mutations can affect important genes such as proto-oncogenes (which promote cell growth) and tumour suppressor genes (which control or slow cell growth). When this happens, the cell may begin to grow or divide when it shouldn’t. Over time, this uncontrolled growth can develop into cancer.
What is a Benign Tumour?
Benign tumours are non-cancerous growths. They don’t invade nearby tissues or spread to other parts of the body. However, they can still cause problems if they continue to grow. Most benign tumours are managed with medicines, regular monitoring, or surgery if required.
What are Malignant Tumours?
Malignant tumours are cancerous growths. They can invade adjacent tissues and spread to other parts of the body. Doctors usually recommend a comprehensive treatment plan that may include surgery, chemotherapy, radiation therapy, immunotherapy, hormone therapy, or targeted therapy, depending on the diagnosis.
What is Secondary Cancer?
Cancers that spread from one part of the body to another through the blood or lymphatic system are called secondary cancers. In simple words, cancers that spread beyond their primary site are called secondary cancers.
Types of Cancer
There are more than 100 types of cancer. Most cancers are classified based on where they begin in the body, like cervical cancer, breast cancer, prostate cancer, throat cancer, gallbladder cancer, or testicular cancer. Below are some common types of cancers based on the type of cell they begin in:
Carcinomas
These cancers start in the skin or in tissues that line the internal organs. Common examples include cervical cancer, prostate cancer, and gallbladder cancer. There are different subtypes of carcinomas, including adenocarcinoma, basal cell carcinoma, squamous cell carcinoma, and transitional cell carcinoma.
Sarcomas
Sarcomas begin in bone, muscle, fat, or connective tissue, such as tendons and ligaments. They are less common.
Leukemias
It is a type of cancer that starts in the tissue that makes blood cells, such as bone marrow. It does not form tumours but leads to the production of abnormal white blood cells in the blood and the bone marrow.
Lymphomas and Myeloma
These two types of cancers begin in the immune system, specifically the lymph nodes or lymphatic tissues. Lymphoma starts in the lymph glands, whereas myeloma begins in the plasma cells (white blood cells made in the bone marrow).
Central Nervous System Cancers
Brain and spinal cord cancers are classified as central nervous system cancers. They affect the brain or the medullary canal containing the spinal cord.
Melanoma
Melanoma is a cancer that begins in specialised cells called melanocytes, which produce melanin (the pigment that gives skin its colour). While most commonly developing on the skin, it can also form in other pigmented tissues like the eyes.
Symptoms of Cancer
Cancer symptoms vary widely from person to person, and they can also change depending on the type and stage of cancer. However, there are some common signs that can indicate abnormal cell growth or possible cancer.
Here are some general symptoms of cancer:
- Fatigue
- Unexplained weight loss
- Persistent cough
- Shortness of breath
- Chest pain
- Coughing up blood
- Night sweats or persistent fever
- Loss of appetite
- Difficulty swallowing
- Change in bowel habits
- Non-healing sores
- Changes in the skin, for instance, the development of new moles or moles that change shape and size
In some cases, cancers may cause additional organ-specific symptoms. Here are some common organ-specific symptoms:
- A persistent cough may suggest throat cancer or lung-related conditions
- Blood in the urine may indicate bladder or kidney issues
- Irregular vaginal bleeding may sometimes be linked to cervical cancer
- Changes in testicle shape or size could require a check for testicular cancer
- Persistent digestive discomfort or yellowing of the skin may relate to gallbladder cancer or liver cancer
Remember, the symptoms are not limited to the ones mentioned above. These symptoms don’t always mean you have cancer. Therefore, it’s always best to speak with a general physician before reaching any conclusions.
What Causes Cancer?
Cancer develops due to genetic mutations that cause abnormal cell growth. However, most cancers are not inherited. They often occur due to gene mutation or external factors. Though there is no specific cause for developing cancer, there are some risk factors that can increase your chances of developing cancer. Such as:
Lifestyle Factors
- Smoking (Active smoking or Second-hand smoke) is one of the leading causes of multiple cancers.
- Poor diet and lack of physical activity can contribute to weight gain and hormonal imbalances, which can put you at risk of developing different types of cancers.
- Alcohol abuse may damage organs and weaken the immune response, increasing the risk of cancer.
- Unsafe sexual practices may increase the risk of infections with viruses linked to certain cancers.
Environmental Exposures-H3
- Long-term exposure to air pollution and industrial chemicals may increase the chances of cancer.
- Ultraviolet radiation from sunlight can damage DNA in skin cells, increasing the risk of skin cancer.
- Passive smoke exposure also significantly increases cancer risk.
Genetic Factors, Age, and Gender-H3
- If someone in your family (parents, siblings, or grandparents) has had cancer, you may have a higher risk of developing it.
- Age is one of the strongest risk factors. Most cancers gradually develop over time.
Diagnosis and Screening
If you or your loved ones notice a lump, an unusual overgrowth, constant fatigue, unexplained weight loss, breathing problems, or any other concerning symptoms, please visit a doctor. You can start by visiting your family doctor, who may refer you to an experienced medical, surgical, or radiation oncologist in Dubai or another city, depending on the complications.
Oncologists may diagnose through blood tests, along with some imaging tests, to confirm if cancer is present. Here’s how the cancer diagnosis and screening process typically looks:
Step 1: Blood Tests
The oncologist may first ask you to get a Complete Blood Count (CBC), blood protein tests, and tumour marker tests.
Step 2: Imaging Tests
Doctors may then recommend imaging tests such as CT scans, MRIs, ultrasounds, or X-rays to locate or confirm a tumour.
Step 3: Biopsy
A biopsy is performed to confirm whether the tumour is benign or malignant. Doctors may recommend either a surgical biopsy (sample collection with an incision) or a non-surgical biopsy (collecting a sample with a needle).
Step 4: Genetic Testing
Some individuals may undergo genetic testing to identify inherited mutations. The results help assess risk and guide preventive steps for family members.
Treatment Options
Oncologists at the best cancer hospital in Dubai may use several treatment approaches to manage your cancer. They might even consider a combination of different treatments. Common cancer treatment options include:
Surgery
Surgery removes cancerous tumours that haven’t spread. Doctors may also remove nearby lymph nodes, depending on the diagnosis. It is often used when cancer is localised and accessible.
Chemotherapy
Chemotherapy involves the use of strong medicines to destroy fast-growing cells. It can also affect healthy cells, which is why some individuals might experience side effects such as nausea, hair loss, fatigue, and appetite loss.
Radiation Therapy
Radiation therapy uses high-energy rays to kill or shrink cancer cells. It can be performed alone or after surgery to destroy any remaining cells.
Immunotherapy
Immunotherapy helps the immune system detect and target cancer cells. It is more targeted and has different side effects compared to chemotherapy.
Targeted Therapy
Targeted therapy uses specialised medications to attack specific changes in cancer cells. They work differently from traditional treatments and are used in certain cancers based on lab results.
Hormone Therapy
Doctors may prescribe medicines to block or lower certain cancer-causing hormones. For example, people with breast cancer may receive treatment to reduce oestrogen levels.
Can Cancer be Prevented?
You can significantly lower cancer risks by making healthy lifestyle changes, staying aware of the symptoms, and seeking timely assistance from experienced doctors. Here are some lifestyle changes that can help lower your risk of developing cancer:
- Follow a balanced diet rich in protein, fibre, whole grains, fruits, and vegetables.
- Stay physically active and maintain a healthy weight.
- Limit alcohol intake and avoid smoking or second-hand smoke.
- Use sun protection daily, especially in hot climates.
Furthermore, your doctor may suggest some evidence-based prevention measures. Such as:
- HPV vaccination
- Hepatitis B vaccination
- Regular Pap smear
- Mammography
- Colonoscopy after 45
- PSA discussion
Along with these prevention measures, schedule regular appointments with your physician to detect any concerns early. For example, women may undergo breast cancer screening as recommended by their doctor, based on age and risk factors. Similarly, men may undergo yearly prostate cancer screening to detect issues early.
Conclusion
Cancer is a complex group of diseases that can affect any part of the body, often developing silently before noticeable symptoms appear. Understanding how cancer develops, recognising early warning signs, and being aware of risk factors are essential to early detection and effective treatment. While not all cancers can be prevented, informed lifestyle choices and timely screenings significantly reduce risk and improve outcomes.
Advances in diagnosis and treatment continue to improve survival rates and quality of life for many individuals. By prioritising regular medical checkups and responding promptly to unusual symptoms, individuals can take meaningful steps toward protecting their long-term health and improving their chances of successful treatment.
FAQs
What is cancer in simple words?
Cancer is a condition where abnormal cells grow uncontrollably and may invade surrounding tissues or spread to other parts of the body through the blood or lymphatic system.
How does cancer form?
Cancer develops when genes are damaged or mutated, leading to uncontrolled growth and division. When important genes such as tumour suppressor genes or proto-oncogenes are altered, cells may continue dividing when they should stop. Over time, the accumulation of these abnormal cells can lead to the development of cancer.
What are the common symptoms of cancer?
Common symptoms include unexplained weight loss, fatigue, persistent pain, fever, skin changes, and lumps that do not go away. If you are experiencing a persistent cough, difficulty swallowing, or changes in bowel habits, you should immediately go for medical evaluation.
What is the biggest indicator of cancer?
There's no single indicator of cancer. However, warning signs include lumps, unexplained weight loss, lumps or thickening in any part of the body, changes in skin appearance and sores that don't heal.
How is cancer diagnosed?
Doctors use blood tests, imaging tests, such as CT, MRI, or ultrasound and most importantly, a biopsy to detect cancer. A biopsy involves examining a small sample of tissue under a microscope to confirm whether cancer cells are present and determine the type and stage.
What are the different types of cancer?
There are more than 100 different types of cancer. Cancer is broadly classified based on the type of cell where it begins. Main types include carcinomas, sarcomas, leukaemias, lymphomas, and cancers of the brain or spinal cord.
What are the treatment options for cancer?
Treatment includes surgery, chemotherapy, radiation, immunotherapy, targeted and hormone therapy based on the cancer’s location and stage. Many patients receive a combination of treatments depending on the complications.
Is cancer hereditary?
Some cancers can run in families due to inherited genes. Certain breast, ovarian, or colorectal cancers may have a hereditary component. But most cases happen without a family history or clear genetic link.
How can I reduce my risk of developing cancer?
Avoid tobacco, eat well, exercise regularly, limit alcohol, protect skin from the sun, and attend all scheduled screening appointments. Regular screening tests and vaccinations, such as HPV and Hepatitis B vaccines, also help lower risk.
What should I do if I suspect I have cancer?
Consult a doctor, especially an oncologist, immediately. Your general physician may refer you to an oncologist for tests. Early diagnosis improves the chances of accurate diagnosis and effective treatment. You may book an appointment at the best hospital in Dubai for early cancer detection and screening packages.