Types of Cancer: Symptoms, Early Signs, Diagnosis & More 

Introduction

Cancer is one of the major health problems around the world, affecting millions of people every year. Even though there is a big advancement in the medical treatment, many cases are detected very late, making the treatment procedure difficult. This is why knowing cancer is important, especially its early signs and symptoms. Finding cancer early can greatly improve the chances of successful treatment and recovery¹. 

There are different types of cancer, which can affect different body parts, and the early symptoms are often not clear or easy to notice. Common warning signs may include unexplained weight loss, constant tiredness, unusual lumps, unusual sweeting, etc². Pain is usually a late feature in many cancers, so paying attention to the other changes in the body and consulting a doctor on time is important  for diagnosis and improving treatment outcomes. 

This article might help you understand the main types of cancer, their early warning signs and how they are diagnosed. The aim is to raise awareness, help detect cancers early, and encourage people to take better care of their health.  

What Is Cancer?

Cancer is a disease that happens when normal cells in the body change and start growing uncontrollably, forming a tumour that can spread and harm healthy tissues¹. However, all tumours are not cancers. They can be benign or malignant³. Also, not all cancers form solid tumours, such as blood cancers, which have no discrete growth as such⁴. 

• Malignant tumours are cancerous tumours that spread to other parts of the body and can be life-threatening 
• Benign tumours are non-cancerous tumours that do not spread, just form a mass of cell³, but they can still cause significant effects due to their size, location, pressure on nearby structures⁵, or hormone secretion. 

The spread of cancer cells from one part of the body to another through the blood or lymph system is called metastasis. In addition, cancer also spread directly into nearby tissues (local invasion)³ or within body cavities, such as the abdomen⁶.  

The risk of cancer increases with age. This is because, over time, the body builds up more risk factors, and the natural repair system of cells becomes less effective as we grow older¹. Other risk factors include family history, lifestyle (smoking, alcohol, etc.), viral infections (human papilloma or hepatitis), etc².   

Cancer develops differently in each person, and not all growths are harmful. With early detection and proper treatment, many cancers can be managed effectively¹.

Main Types of Cancer

There are different types of cancers which can develop in different body parts. Most of these cancers have very few known causes^4,7,9. The following might help you understand how many types of cancer exist based on the types of cancer cells. 

1. Carcinoma

Carcinoma is a type of cancer that starts in epithelial tissue, which covers the skin and lines the inside of organs and body passages. It can develop in tissues that produce or secrete substances, such as in the breast, lungs, colon, prostate, or bladder, (adenocarcinoma) or in flat, thin cells that form the skin surface and line some internal organs (squamous cell carcinoma)¹⁰. The common cause is the accumulation of genetic changes over time, which leads cells to uncontrolled growth of cells. The risk factors that can trigger these genetic alterations including smoking, alcohol consumption, chemical exposure, lack of physical activity, obesity, etc^11,12. 

2. Sarcoma

Sarcoma is a type of cancer that begins in the body’s supportive and connective tissues like bones, muscles, fat, cartilage, and tendons. It is more common in children and in adolescents, compared to carcinoma. However, several other types (soft tissue sarcomas) can also occur in adults. It often appears as a painful lump, especially in the bones, and the tumour usually looks like the normal tissue from where it starts¹⁰. It is commonly caused by mutation in the gene due to exposure to radiation or by certain cancer-causing chemicals (carcinogens)⁹.   

3. Leukaemia

Leukaemia is a blood cancer that begins in the bone marrow, the place where blood cells are produced. It disrupts the normal functioning of bone marrow, leading to the reduced production of red blood cells and the platelet count. This can cause problems like fatigue, anaemia, and poor blood clotting¹⁰. The risk factors include family history, age and sex, exposure to harmful radiations and chemicals, and viral infections (human T-cell leukaemia virus)⁴. 

4. Myeloma

Myeloma (multiple myeloma) is a type of cancer that affects plasma cells, which are white blood cells that help fight infection by making antibodies⁸. The plasma cells produce certain types of protein (monoclonal (M) protein/paraprotein) which are found in the blood¹⁰. Here, abnormal plasma cells grow too much in the bone marrow and replace healthy blood cells, affecting red cells, white cells, and platelets. The risk factors include age, exposure to x-rays or other radiations, people belonging to specific races, etc⁸.  

5. Lymphoma

Lymphoma is a type of cancer that starts in the lymphatic system, which includes lymph nodes, spleen, tonsils, and thymus. This system helps fight infections by supporting the development and activation of white blood cells. It is a type of blood-related (hematologic) cancer, that is often seen as enlarged lymph nodes or mass-like growths. It can also develop in organs like the stomach, breast, or brain¹⁰. People with weak immune systems, those on immune-suppressing medicines, Epstein-Barr virus infection, radiation exposure, and those with a family history are at higher risk of developing lymphoma⁷.  

Common Types of Cancer & Their Symptoms

There are several types of cancers. Below are some common types and their symptoms. 

1. Breast Cancer

• Affects the breast tissue in women but can also occur in men in rare cases. 
• It develops when cells in the breast grow and divide uncontrollably. 
• Risks include dense breast, family history (especially mutations in genes such as BRCA1 and BRCA2), other inherited conditions (hereditary breast cancer syndromes), alcohol consumption, obesity, etc. 
• Symptoms include a painless lump in the breast or armpit (most common early sign), changes in breast size or shape, inward-turning nipple, unusual nipple discharge, skin dimpling (small pits), redness or swelling, and breast pain¹². 

2. Lung Cancer

• Starts in the lungs, usually in the cells lining the airways. 
• Can occur in both men and women. 
• Risk factors include smoking, second hand-smoking (inhaling smoke from while others smoke), family history, getting exposed to certain chemicals and radiations, human immunodeficiency virus (HIV) infection and air pollution. 
• Symptoms include chest pain or discomfort, weight loss, appetite loss, breathing problems, tiredness, blood in the cough, swelling (face or neck), etc¹¹. 

3. Colorectal Cancer

• Starts in the colon or rectum, which are parts of the digestive system that help process and pass waste out of the body.  
• It develops due to the accumulation of genetic and epigenetic changes over time. In many cases, it begins as a small abnormal growth in the colon called polyps. These polyps can be found early during screening tests and removed before they turn into cancer¹³. 
• Risk factors include high intake of processed food and red meat, alcohol use, smoking, obesity, low physical activity, older age, and conditions like diabetes. 
• Symptoms include rectal bleeding, blood in stool, changes in bowel movement, abdominal and rectal pain, rectal lumps, weight loss, fatigue, etc¹⁴.  

4. Prostate Cancer

• Begins in the cells of the prostate, a gland in the male reproductive system located just below the bladder that produces fluid for semen. 
• It develops due to changes in genes over time and is also affected by male hormones (androgens), which can help the cancer cells grow in the prostate. 
• Risk factors include family history of prostate cancer, age (50 and above) and race (African Americans). 
• Early detection is done using screening tests like the PSA blood test and digital rectal exam (DRE). However, the final diagnosis is confirmed only by a prostate biopsy. 
• Symptoms include urinating problems (difficulty to control, burning when peeing, frequent urination, sudden urge), back and hip pain, pain on ejaculation, etc¹⁵. 

5. Skin Cancer

• Includes a wide range of non-cancerous and cancerous growths that develop in the skin as visible patches or plaques. 
• Involves the abnormal growth of skin cells on the neck, head, lips, nose, etc. 
• Risk factors include age, sex, family history, light skin (reduced melanin), disease history, weak immune system, UV exposure, vitamin imbalance, etc. 
• Symptoms include itching, bleeding, pain, and irritation¹⁶. 

Early Signs of Cancer

Although different types of cancer show different signs and symptoms, there are some warning signs to watch out for. The following are some early signs of cancer that you should not ignore. 

• Weight Changes: Unexpected weight gain or weight loss. 
• Persistent Tiredness: Tiredness that does not go away even after rest and continues for a long period of time. 
• New Lumps: Sudden lump formation or a firm area in the part of the body where cancer has developed (breast, neck, stomach, underarms, etc.) 
• Skin Changes: New moles or changes in existing moles, such as changes in shape, colour, or size, or a skin sore that does not heal over time. 
• Unusual Bleeding: Uncommon bleeding such as bleeding from the mouth or from a mole, blood in stool or a bruise on the skin. 
• Neurological Problems: Unusual neurological issues like headache, dizziness, vision and hearing changes, drooping of the face (sagging or weakness of one side), etc¹⁷. 

Why Early Detection Matters?

Early detection of cancer plays a crucial role in improving outcomes and saving lives. The following says why early detection matters and how it is helpful to patients. 

• Better Response to Treatment: Treatment response is better when the cancer is smaller, localised, and less complex, making therapies more successful and easier to manage. 
• Improved Survival Rate: Chances of survival are higher when cancer is identified at an earlier stage, as it is more likely to respond effectively to treatment and has not yet spread to other parts of the body. 
• Less Complications: Early detection helps avoid severe complications that occur in later stages, leading to smoother treatment and faster recovery. 
• Lower Treatment Cost: Treatment is generally less expensive in initial stages because it often requires simpler, shorter, and less intensive treatments, reducing hospital stays and overall healthcare costs¹. 
• Better Quality of Life: Early detection allows for simpler and less invasive treatments, helping patients stay more comfortable and maintain their daily routines.  
• Lowers Psychological Stress: Reduces anxiety, helps patients make informed decisions, increases awareness about cancer risk, and promotes healthy habits to prevent disease¹⁸. 

Note: Early detection helps improve outcomes in many cancers like breast, cervical, and colorectal cancer, but it is not equally effective for all cancers. Some, like pancreatic cancer, are often found late, while others (e.g., prostate or thyroid cancer) may be over diagnosed. Early treatment can improve well-being but may still cause side effects, and even advanced cancers can sometimes be managed with good care. 

Blood Test for Early Cancer Detection

The following is a list of blood tests performed in early cancer detection. 

Basic Tests

• Blood Chemistry Test 
  • Measures certain substances such as enzymes, proteins, sugar, fats, etc., released into the blood by the organs or tissues. 
  • Provides information on your organs and how well they work. 
  • Help detect abnormal levels (high or low) of certain substances in the blood, which may indicate a disease or side effects of treatment. 
• Complete Blood Count (CBC)
  • Measures the blood cells (red, white, and platelets) and checks the haemoglobin levels, red blood cell size, and how much of your blood is made up of these cells. 
  • Helps diagnose cancers like leukaemia; also monitors health during and after the treatment. 
• Tumour Marker Test 
  • Measure substances that may be produced by cancer cells or by the body in response to cancer, which is also made by normal cells, but in much lower amounts. 
  • Help in screening, monitor treatment response, assist in prognosis, and detect possible recurrence of cancer. 
  • Some examples of tumour markers include: 
  • Prostate-specific antigen (PSA): For prostate cancer 
  • CA-125: For ovarian cancer 
  • CEA (Carcinoembryonic Antigen): For colorectal and some other types 
  • BRCA1 and BRCA2 gene mutations: Breast and ovarian cancers¹⁹ 

Advanced Tests

• Liquid Biopsy 
  • Helps identify pieces of DNA or cancer cells from tumour cells that are released into the blood. 
  • Might help detect cancer at an early stage, help in planning the treatment, determine the effectiveness of treatment or predict a cancer comeback. 
• Immunophenotyping 
  • Uses special proteins called antibodies, tagged with fluorescent dyes, to detect specific antigens (CD markers) on the surface of the cells. 
  • Helps in the diagnosis, staging, and monitoring of blood cancers and other blood-related disorders, including leukaemias, lymphomas, myelodysplastic syndromes, and myeloproliferative disorders. 
• Genetic Analysis 
  • Looks for changes in chromosomes, to detect large structural or numerical changes, such as missing, extra, broken, or rearranged chromosomes, which may be linked to genetic conditions or certain cancers. 
  • Advanced molecular techniques like FISH or PCR can even detect small mutations or microdeletions. 
  • Helps in diagnosing cancer, planning treatment, and monitoring how well the treatment is working²⁰. 

Note: Diagnosis of cancer typically requires histopathological confirmation (biopsy); imaging or basic blood screening tests alone are generally not definitive for most cancers. 

When to Consult a Doctor?

You should consider seeing a doctor if you notice: 

• Unexplained weight loss without any changes in diet or lifestyle^2,11,14 
• Lack of appetite² 
• Persistent fatigue^11,13 which does not improve on rest 
• A lump or swelling anywhere in the body that doesn’t go away^12,17 
• Changes in skin, such as new moles or changes in size, shape, or colour of existing ones^16,17 
• Unusual bleeding or discharge, such as blood in urine or stool, from the breast, or while coughing^11,12,15,17 
• Persistent and unusual pain that lasts for weeks without a clear cause² 
• Changes in bowel or bladder habits, like ongoing constipation, diarrhoea, or difficulty urinating^14,15 
• A cough or hoarseness that doesn’t go away¹¹ 
• Difficulty swallowing, chest pain or breathing problems¹¹ 

Also Read: Does Masturbating Increase Risk of Prostate Cancer or Vice Versa?

Conclusion

Cancer is a serious condition, but it can often be effectively managed, especially with early detection. Recognising warning signs and going for regular check-ups can greatly improve treatment outcomes. Understanding different types of cancer and their symptoms helps you stay aware and take timely action. Prioritising your health and consulting a doctor when needed can make a life-saving difference. 

Frequently Asked Questions (FAQs)

References

1. Cancer. 2025. Doi: https://www.who.int/news-room/fact-sheets/detail/cancer 

2. Cancer: NHS. 2025. Doi: https://www.nhs.uk/conditions/cancer/ 

3. Cancer: Medline. 2025. Doi: https://medlineplus.gov/cancer.html 

4. Leukaemia. 2023. Doi: https://www.healthdirect.gov.au/leukaemia 

5. Benign. 2025. Doi: https://medlineplus.gov/ency/article/002236.htm 

6. Menon G, Santillan VR. Peritoneal Surface Malignancies. 2025. Doi: https://www.ncbi.nlm.nih.gov/books/NBK541114/ 

7. Lymphoma. 2025. Doi: https://www.healthdirect.gov.au/lymphoma 

8. Myeloma Basics. 2025. Doi: https://www.cdc.gov/myeloma/about/index.html 

9. Causes, Risk Factors, and Prevention of Soft Tissue Sarcomas. 2026. Doi: https://www.cancer.org/cancer/types/soft-tissue-sarcoma/causes-risks-prevention.html 

10. Cancer Classification. Doi: https://training.seer.cancer.gov/disease/categories/classification.html 

11. Lung Cancer. 2025. Doi: https://medlineplus.gov/lungcancer.html 

12. Breast Cancer. 2025. Doi: https://medlineplus.gov/breastcancer.html 

13. Colorectal Cancer. 2024. Doi: https://medlineplus.gov/colorectalcancer.html 

14. Bowel cancer (colon and rectal cancer). 2023. Doi: https://www.healthdirect.gov.au/bowel-cancer 

15. Prostate Cancer. 2024. Doi: https://medlineplus.gov/prostatecancer.html 

16. Sathe NC, Zito PM. Skin Cancer. 2025. Doi: https://www.ncbi.nlm.nih.gov/books/NBK441949/ 

17. Symptoms of Cancer. 2019. Doi: https://www.cancer.gov/about-cancer/diagnosis-staging/symptoms 

18. Imai M, Nakamura Y, Yoshino T. Transforming cancer screening: the potential of multi-cancer early detection (MCED) technologies. Int J Clin Oncol. 2025;30(2):180-193. doi:10.1007/s10147-025-02694-5. https://pubmed.ncbi.nlm.nih.gov/39799530/ 

19. Tumor Marker Tests in Common Use. 2023. Doi: https://www.cancer.gov/about-cancer/diagnosis-staging/diagnosis/tumor-markers-list 

20. How Cancer Is Diagnosed. 2023. Doi: https://www.cancer.gov/about-cancer/diagnosis-staging/diagnosis 

21. Sim AJ, Kaza E, Singer L, Rosenberg SA. A review of the role of MRI in diagnosis and treatment of early stage lung cancer. Clinical and Translational Radiation Oncology. 2020;24:16-22. doi:10.1016/j.ctro.2020.06.002. https://pmc.ncbi.nlm.nih.gov/articles/PMC7306507/ 

22. Vogt A, Schmid S, Heinimann K, et al. Multiple primary tumours: challenges and approaches, a review. ESMO Open. 2017;2(2):e000172. doi:10.1136/esmoopen-2017-000172. https://www.esmoopen.com/article/S2059-7029(20)32451-0/fulltext 

23. Kalra K. Common Cancers in India, theirincreasing incidence. Symptomswhich need immediate attention. Doi: https://www.cghs.mohfw.gov.in/CGHSGrievance/FormFlowXACTION?hmode=ftpFileDownload&fileName=23052025114829_Common-Cancers-in-India-their-increasing-incidence-(9-November-2021)-.pdf&folderName=Circular&isGlobal=1 

24. Nicholson BD, Hamilton W, O’Sullivan J, Aveyard P, Hobbs FR. Weight loss as a predictor of cancer in primary care: a systematic review and meta-analysis. Br J Gen Pract. 2018;68(670):e311-e322. doi:10.3399/bjgp18X695801. https://pubmed.ncbi.nlm.nih.gov/29632004/ 

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