Cancer

Understanding Cancer: Causes and Risk Factors

Cancer develops when abnormal cells in the body begin to grow uncontrollably and spread to other tissues. This disease can affect virtually any part of the body, including the lungs, breast, colon, prostate, and skin. Understanding the causes and risk factors is essential for prevention and early detection.

Common risk factors include smoking, excessive alcohol consumption, poor diet, lack of physical activity, and prolonged sun exposure. Genetic factors also play a significant role, as some families have a higher predisposition to certain cancer types. Age is another important factor, as cancer rates increase with age. Additionally, chronic infections, hormonal factors, and occupational exposures can contribute to cancer development. Regular screening and lifestyle modifications can significantly reduce your risk.

Types of Cancer and Their Symptoms

Different cancers present with varying symptoms, and recognising these early signs is crucial for successful treatment.

Breast Cancer

Breast cancer is the most common cancer affecting women in the UK. Symptoms include lumps in the breast, changes in breast shape or size, and discharge from the nipple. Early detection through mammography screening can improve survival rates significantly.

Lung Cancer

Lung cancer often develops with no early symptoms but may present as persistent cough, chest pain, or blood in sputum. Smokers and former smokers face elevated risk. Screening with low-dose CT scans is recommended for high-risk individuals.

Colorectal Cancer

Colorectal cancer affects the colon or rectum and may cause changes in bowel habits, blood in stool, or abdominal discomfort. Screening through colonoscopy or faecal tests is highly effective in detecting precancerous polyps.

Prostate Cancer

Prostate cancer primarily affects men and often grows slowly. Symptoms may include difficulty urinating, frequent urination, or erectile dysfunction. PSA blood tests and digital rectal examinations help with early detection.

Skin Cancer

Skin cancer includes melanoma and non-melanoma types. Warning signs include changes in existing moles, new unusual growths, or lesions that don’t heal. Sun protection and regular skin checks are vital prevention strategies.

Cancer Treatment Options and Medications

Modern cancer treatment often involves a combination of approaches tailored to the specific type and stage of cancer.

Chemotherapy

Chemotherapy uses powerful drugs to kill cancer cells or stop their growth. Common chemotherapy drugs available in the UK include Doxorubicin, Paclitaxel, and 5-Fluorouracil. These medications can be administered intravenously or orally, depending on the treatment plan.

Targeted Therapy

Targeted therapy drugs work by targeting specific molecules involved in cancer cell growth. Medications such as Trastuzumab (Herceptin) for HER2-positive breast cancer and Imatinib (Glivec) for chronic myeloid leukaemia are available through the NHS and private providers.

Immunotherapy

Immunotherapy harnesses the body’s immune system to fight cancer. Checkpoint inhibitors like Nivolumab (Opdivo) and Pembrolizumab (Keytruda) have shown remarkable results in treating various cancers, including melanoma and lung cancer.

Hormone Therapy

Hormone therapy is used for hormone-sensitive cancers. Tamoxifen remains a cornerstone treatment for breast cancer, whilst aromatase inhibitors like Letrozole are increasingly prescribed. These medications reduce hormone levels or block their effects on cancer cells.

Radiotherapy

Radiotherapy uses high-energy radiation to destroy cancer cells and is often combined with other treatments. It can be administered externally or internally, depending on the cancer location and type.

Managing Side Effects and Supportive Care

Cancer treatments can cause various side effects, and managing them is crucial for maintaining quality of life during and after treatment.

Nausea and vomiting are common chemotherapy side effects. Anti-emetic medications such as Ondansetron and Granisetron are routinely prescribed to prevent these symptoms. Taking medication before treatment can significantly reduce discomfort.
Hair loss occurs with many chemotherapy regimens. Scalp cooling devices and supportive care can help minimise this distressing side effect. Hair typically regrows several months after treatment completion.
Fatigue is one of the most prevalent side effects. Regular gentle exercise, adequate rest, and nutritional support help manage cancer-related fatigue. Psychological support and counselling can also be beneficial.
Mouth ulcers and dental problems may develop during treatment. Specialist mouthwashes and dental care are recommended. Maintaining oral hygiene is essential to prevent infections.
Fertility and sexual function may be affected by cancer treatments. Patients should discuss fertility preservation options, such as egg or sperm banking, before starting treatment. Sexual dysfunction can often be managed with specialist advice and medications.
Bone health requires attention, especially with certain cancer types and treatments. Calcium and vitamin D supplementation, along with weight-bearing exercise, help maintain bone density. Medications like bisphosphonates may be prescribed when necessary.

Screening and Early Detection Programmes

Early detection significantly improves cancer treatment outcomes and survival rates. Several NHS programmes offer regular screening for different cancer types:

Breast Screening Programme

The NHS Breast Screening Programme invites women aged 50-74 for mammography every three years. Women at higher risk can access more frequent screening and MRI examinations.

Bowel Cancer Screening Programme

The Bowel Cancer Screening Programme offers faecal immunochemical testing (FIT) to all adults aged 60-74. Positive results lead to colonoscopy for further investigation. This programme has been highly successful in detecting cancers at earlier, more treatable stages.

Cervical Screening Programme

The Cervical Screening Programme provides regular smear tests to women aged 21-65, significantly reducing cervical cancer incidence. The introduction of HPV testing has improved screening accuracy.

Lung Cancer Screening

Lung cancer screening is offered to high-risk smokers and former smokers through low-dose CT scanning in certain areas. This has proven effective in detecting early-stage lung cancers.

Skin Surveillance

Skin surveillance through regular self-examination and GP checks helps identify suspicious lesions early. Dermoscopy and biopsy can confirm diagnosis before cancer progresses.

Living with Cancer: Support and Resources

A cancer diagnosis affects not only physical health but also emotional and psychological wellbeing. Comprehensive support is available throughout your cancer journey:

NHS services provide comprehensive cancer care through oncology departments, clinical nurse specialists, and multidisciplinary teams. Treatment is coordinated to ensure the best possible outcomes. Counselling and mental health support are crucial components of cancer care, helping patients cope with diagnosis, treatment anxiety, and long-term psychological effects. Cognitive behavioural therapy and support groups are particularly effective.

Charities and support organisations such as Cancer Research UK, Macmillan Cancer Support, and Teenage Cancer Trust provide invaluable resources, financial assistance, and peer support programmes. Nutritional support from specialist dietitians helps maintain strength during treatment and recovery, and proper nutrition can improve treatment tolerance and overall wellbeing.

Rehabilitation services help patients regain function and fitness after treatment. Exercise programmes, occupational therapy, and physiotherapy support physical recovery. Follow-up care and surveillance continue after treatment completion to monitor for recurrence and manage long-term effects. Regular appointments with oncologists ensure any changes are detected early, giving patients the best chance of maintaining remission and quality of life.