Cancer remains one of the most significant health challenges globally. However, with modern advancements in screening and treatment, understanding the basics is the first step toward prevention and recovery.
In this article we focus on what is cancer and how is it treated. Read our comprehensive guide on the 10 most common questions about cancer, from diagnosis to the latest treatment options.
Cancer is a group of diseases characterized by uncontrolled cell growth. In a healthy body, cells grow, divide, and die in a regulated cycle. Cancer begins when genetic mutations damage a cell’s DNA, causing it to ignore the “stop” signal.
Instead of dying, these abnormal cells multiply rapidly, often forming a mass called a tumor. While some tumors are benign (non-cancerous), malignant tumors can invade nearby tissues and interfere with vital organ functions.
While there are over 100 types of cancer, the most frequently diagnosed include:
Breast Cancer: The most common cancer in women globally.
Lung Cancer: Often linked to smoking, but also environmental factors like radon.
Prostate Cancer: One of the leading cancers affecting men.
Colorectal (Bowel) Cancer: Affects the digestive system; highly preventable through screening.
Skin Cancer: Includes Basal Cell Carcinoma and Melanoma (the most dangerous form).
Early detection is the “gold standard” for survival. According to the World Health Organization (WHO), early diagnosis significantly improves outcomes. Doctors use:
Physical Exams: Checking for lumps or skin changes.
Imaging: X-rays, CT scans, MRIs, and PET scans to visualize internal structures.
Laboratory Tests: Blood and urine tests (looking for “tumor markers”).
Biopsy: The only definitive way to diagnose cancer; a small tissue sample is analyzed under a microscope.
The process of cancer spreading is called metastasis. It occurs when cancer cells break away from the original (primary) tumor and travel through the bloodstream or lymphatic system.
If these cells settle in a new organ—such as the lungs, liver, or bones—they form secondary tumors. Even if it spreads, the cancer is still named after its origin (e.g., breast cancer that spreads to the liver is still called “metastatic breast cancer”).
The rise in cancer diagnoses is primarily driven by increased life expectancy. Because DNA damage accumulates over time, age is the single greatest risk factor for cancer. Other factors include:
Rising rates of obesity and sedentary lifestyles.
Environmental pollutants.
Increased global tobacco and alcohol consumption.
While no “superfood” can 100% prevent cancer, nutrition plays a massive role. The American Cancer Society recommends a diet focused on plant-based foods for risk reduction.
High Risk: Diets high in processed meats, red meat, and excessive alcohol.
Protective: A diet rich in fiber, antioxidants (found in colorful fruits and vegetables), and legumes.
Most cancers are “sporadic,” meaning they happen by chance or due to lifestyle. Only about 5% to 10% of cancers are caused by inherited gene mutations. The most well-known are the BRCA1 and BRCA2 mutations. Having these does not guarantee a cancer diagnosis, but it does increase the statistical risk.
Modern medicine uses a multi-modal approach:
Surgery: Physically removing the tumor.
Chemotherapy: Using drugs to kill rapidly dividing cells.
Radiotherapy: Using high-energy beams to destroy cancer DNA.
Immunotherapy: Training the immune system to recognize and attack cancer.
Targeted Therapy: Drugs that attack specific proteins that help cancer grow.
Chemotherapy targets cells that grow quickly. However, some healthy cells—like those in your hair follicles, skin, and digestive tract—also grow quickly. When treatment affects these healthy cells, it results in common side effects like hair loss and nausea.
In many cases, yes. Survival depends heavily on the stage at diagnosis:
Stage I & II: Localized; often highly treatable.
Stage III & IV: Spread to lymph nodes or distant organs; more complex to manage.
Doctors often prefer the term “Remission” rather than “Cure.” Complete remission means there are no detectable signs of cancer in the body.
Above we have addressed the most frequently asked questions about cancer using the latest medical insights; with 10 common questions about cancer – including its symptoms, causes & treatments. We hope it has been helpful.
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