Wed. Dec 31st, 2025

Understanding Cancer (Breast, Lung & Prostate): Causes, Symptoms, Diagnosis, Treatment & Diet Plan for Patients

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Health Desk
Sandeep Dhand Ludhiana
Nutritionist And Health Educator

Introduction

Cancer is one of the most serious health challenges faced by people all over the world. It occurs when abnormal cells in the body grow uncontrollably and spread to other parts. Although many cancers exist, breast cancer, lung cancer, and prostate cancer are among the most common types found in adults. Early detection, proper treatment, and lifestyle changes—especially nutrition—play a major role in managing cancer and improving quality of life.

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This article explains cancer in simple language, covering how it develops, the causes, symptoms, diagnosis, treatment options, and a complete diet plan for cancer patients. Whether you are a patient, caregiver, student, or health educator, this article will help you understand cancer deeply and practically.

WHAT IS CANCER?

Cancer begins in the body’s cells. Normally, cells grow, divide, and die in a controlled manner. But when genetic damage occurs, cells start multiplying rapidly without control. These abnormal cells form a mass called a tumor.

Types of Tumors

A. Benign tumor

Non-cancerous

Does not spread

Usually slow growing

B. Malignant tumor

Cancerous

Grows aggressively

Can spread to other parts of the body through blood or lymph

This spreading process is called metastasis

RISK FACTORS FOR CANCER

Cancer develops due to a combination of factors. Not all causes are in our control, but many are preventable.

A. Genetic Factors

Family history

Inherited mutations (BRCA1, BRCA2 in breast cancer)

B. Lifestyle Factors

Smoking

Alcohol

Unhealthy diet

Physical inactivity

Obesity

C. Environmental Factors

Radiation exposure

Polluted air (linked strongly to lung cancer)

Chemicals and industrial toxins

D. Hormonal Factors

High estrogen exposure in women

Testosterone imbalance in men (linked with prostate issues)

E. Age

Cancer risk increases with age

Most breast and prostate cancer cases occur after 50

What is Breast Cancer?

Breast cancer occurs when abnormal cells begin growing in breast tissue. It affects both women and men, but women are at a much higher risk.

Causes

Genetic mutations (BRCA1 & BRCA2 genes)

Hormonal imbalance

Long-term hormone replacement therapy

Late pregnancy or not breastfeeding

Obesity

Alcohol consumption

Common Symptoms

Lump in the breast

Change in breast shape or size

Nipple discharge (sometimes bloody)

Skin dimpling (orange-peel texture)

Pain in breast or armpit

Diagnosis

Mammography

Breast ultrasound

MRI

Biopsy (definitive diagnosis)

Treatment

Treatment depends on stage and type.

A. Surgery

Lumpectomy (tumor removal only)

Mastectomy (entire breast removal)

B. Chemotherapy

Uses strong medicines to kill cancer cells.

C. Radiation Therapy

High-energy rays destroy cancerous tissue.

D. Hormone Therapy

Reduces estrogen effects (Tamoxifen, Aromatase inhibitors).

E. Targeted Therapy

E.g., Trastuzumab (Herceptin) for HER2-positive cancer.

What is Lung Cancer?

Lung cancer begins in the cells of the lungs. It is one of the leading causes of cancer deaths worldwide.

Causes

Smoking (main cause in 85% of cases)

Secondhand smoke

Air pollution

Radon exposure

Family history

Asbestos exposure

Symptoms

Persistent cough

Coughing blood

Shortness of breath

Chest pain

Unintentional weight loss

Frequent lung infections

Diagnosis

Chest X-ray

CT scan

PET scan

Bronchoscopy

Biopsy

Treatment

Depends on type: Non-small cell lung cancer (NSCLC) or Small cell lung cancer (SCLC).

A. Surgery

If cancer is detected early.

B. Radiation Therapy

C. Chemotherapy

D. Immunotherapy

Helps immune system attack cancer.

E. Targeted Therapy

EGFR, ALK inhibitors used for specific gene mutations.

What is Prostate Cancer?

Prostate cancer occurs in the prostate gland of men. It is common after age 50.

Causes

Age

Family history

High-fat diet

Obesity

Hormonal factors

Genetic mutations

Symptoms

Early prostate cancer often has no symptoms. Advanced stages may show:

Difficulty urinating

Weak urine flow

Blood in urine or semen

Pain in hips or lower back

Erectile dysfunction

Diagnosis

PSA test (Prostate-Specific Antigen)

Digital rectal exam (DRE)

Biopsy

MRI/CT scan

Treatment

Depends on stage.

A. Active Surveillance

For slow-growing cancer.

B. Surgery (Prostatectomy)

C. Radiation Therapy

D. Hormone Therapy

Reduces testosterone.

E. Chemotherapy

F. Immunotherapy

COMMON SIDE EFFECTS OF CANCER TREATMENT

Cancer treatment affects both cancer cells and healthy cells.

Common Side Effects

Nausea & vomiting

Loss of appetite

Weight loss

Weakness

Mouth sores

Hair loss

Constipation or diarrhea

Low immunity

Taste changes

Proper nutrition plays a major role in recovery and strengthening the immune system.

NUTRITION AND DIET FOR CANCER PATIENTS

Nutrition is one of the most important parts of cancer care. A good diet helps:

Improve strength

Maintain body weight

Reduce side effects of treatment

Support immunity

Promote healing

Below is a complete, easy-to-follow cancer diet plan.

BEST FOODS FOR CANCER PATIENTS

A. High-Protein Foods

Cancer patients often lose muscle mass. Protein supports repair and immunity.

Paneer

Curd

Milk

Eggs

Dal, chana, rajma

Soya

Chicken or fish (if non-veg)

Peanut butter

Nuts and seeds

B. Healthy Carbohydrates

Provide energy.

Oats

Dalia

Brown rice

Whole wheat chapati

Sweet potato

C. Healthy Fats

Help reduce inflammation.

Olive oil

Coconut

Flaxseed

Walnuts

Chia seeds

D. Antioxidant-Rich Foods

Help fight free radicals.

Blueberries

Strawberries

Apples

Pomegranate

Turmeric

Green tea

E. Vegetables

Especially cruciferous vegetables:

Broccoli

Cauliflower

Cabbage

Spinach

Carrots

Beetroot

F. Hydration

Very important, especially during chemo.

Water

Coconut water

Herbal teas

ORS

Vegetable soups

FOODS TO AVOID FOR CANCER PATIENTS

Avoid:

Junk food

Processed meat

Deep fried foods

Excess salt

Too much sugar

Alcohol

Cigarettes or tobacco

Soft drinks

Packaged juices

Foods with preservatives

Morning (Empty Stomach)

Warm water + turmeric
OR

Aloe vera juice + 1 tsp honey

Breakfast

Oats porridge + fruits

OR vegetable upma

OR boiled eggs

OR paneer paratha with curd

Mid-Morning Snack

Coconut water

OR apple/papaya

OR handful of nuts

Lunch

2 chapati (multigrain)

Dal or paneer

1 cup vegetables

Brown rice (small portion)

Beetroot salad

Evening Snack

Green tea

Roasted chana

OR vegetable soup

Dinner

Vegetable khichdi

OR dal + rice (soft)

OR grilled chicken/fish (non-veg patients)

Light sabzi

Before Bed

Turmeric milk

OR chamomile tea

Recommended

Soy products (tofu, soya milk)

Omega-3 rich foods

Berries

Spinach

Whole grains

Avoid

High-fat foods

Processed meat

Excessive sweet foods

Recommended

Antioxidant-rich fruits

Citrus fruits (Vitamin C)

Garlic

Ginger

Green leafy vegetables

Protein-rich foods

Avoid

Alcohol

Deep-fried foods

Red meat in excess

Recommended

Tomatoes (lycopene)

Pumpkin seeds

Broccoli

Green tea

Whole grains

Nuts

Avoid

High dairy intake

Processed foods

Red meat in excess

LIFESTYLE TIPS FOR CANCER PATIENTS

Eat small, frequent meals

Stay hydrated

Light walking daily

Avoid stress

Practice yoga/meditation

Take enough sleep

Avoid smoking and alcohol

Follow doctor’s medication and treatment schedule

CONCLUSION

Cancer—whether breast, lung, or prostate—is a serious but manageable disease when detected early and treated properly. Medical treatment combined with good nutrition, emotional support, and lifestyle changes can dramatically improve recovery and quality of life. Diet plays a major role in boosting immunity, reducing treatment side effects, and helping the body stay strong.

A balanced diet full of fruits, vegetables, proteins, healthy fats, and whole grains is essential for every cancer patient. With holistic care and awareness, cancer management becomes easier and more effective.

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