Breast cancer has become increasingly common in recent years, touching many families. However, there is very hopeful news: breast cancer is highly treatable when caught early! 

The five-year survival rate for breast cancer in India has risen to 66.4%. Even more heartening is the impact of catching it early: women diagnosed at a localised stage are 4.4 times more likely to survive than those diagnosed at a later stage. 

In fact, a 2025 study from the National Library of Medicine shows that in comprehensive care programs focused on early detection, survival rates jump to an incredible 85.2%.

The challenge we face is that around 57% of cases in India are detected at Stage 3 or 4. This is why we encourage you not to wait. Even the slightest change in your breasts must be addressed immediately for your safety and health.

What Is Breast Cancer?

Breast cancer occurs when cells in the breast begin to grow out of control. These cells usually form a tumour that can often be seen on an X-ray or felt as a lump.

However, not all lumps are cancerous. Many are benign cysts or fibrous tissue. To be sure, doctors look at where the cells originated.

• Ductal Cancer: Starts in the tubes (ducts) that carry milk to the nipple.

• Lobular Cancer: Starts in the glands (lobules) that make milk.

Knowing the types of breast cancer is important because it helps decide the best path forward. If the cells remain where they started, it is generally considered non-invasive. If they break through the walls of the glands or ducts into the surrounding tissue, it is called invasive.

How Are Breast Cancer Stages Determined: The TNM System

Before assigning a number (0-4), doctors use a standard system called TNM to evaluate the cancer.

• T (Tumour): How large is the primary tumour?

• N (Node): Has it spread to the lymph nodes (the bean-shaped filters under the arm)?

• M (Metastasis): Has it spread to other parts of the body?

By combining these three factors, your medical team determines the stage.

What are the Different Stages of Breast Cancer?

The stages are numbered 0 through 4. Lower numbers mean the cancer is smaller and less spread out, while higher numbers indicate it has grown or spread.

Stage 0: Pre-Cancer (Non-Invasive)

It is like the “pre-cancer” stage, the earliest form of detection. At this point, some abnormal cells have started to grow inside the milk ducts of the breast. 

The good part is that they are trapped inside the duct and haven't broken out into the rest of the breast tissue yet. It’s called Ductal Carcinoma In Situ (DCIS).

This is the earliest form of detection. Abnormal cells are found in the lining of the breast duct, but they have not spread into the surrounding breast tissue. It is often called Ductal Carcinoma In Situ (DCIS).

• Outlook: Because it’s caught so early, this stage is highly curable. Most women go on to live long, healthy lives after simple treatment, which usually involves surgery and sometimes a bit of radiation to make sure those cells don't come back.

• Symptoms: Usually none. You typically can’t feel a lump at this stage. It is almost always caught on a routine mammogram, though occasionally you might notice tiny skin changes or nipple discharge.

Stage 1: Early Invasive Cancer

At this stage, the cancer cells are breaking through to nearby breast tissue, but they are still very small.

• Stage 1A: The tumour is small (peanut-sized, less than 2cm) and has not reached the lymph nodes.

• Stage 1B: Small clusters of cancer cells are found in the lymph nodes, or there is no tumour in the breast but small deposits in the nodes.

1st Stage of Breast Cancer Symptoms to Watch:

Often, there are no obvious signs at this stage, which is why mammograms are important. However, some women may notice a small, hard lump or slight skin dimpling. If you notice any unusual changes during self-examination of your breasts, please don't panic. Just book a consultation with a gynaecologist to get an expert diagnosis.

Stage 2: The Tumour is Growing

Stage 2 breast cancer means the cancer is larger or has started to move to a few nearby lymph nodes under the arm.

• It is still contained in the breast region.

• The tumour might be larger (up to 5cm), or it might be smaller but with positive lymph node involvement.

This is where breast cancer treatment options like surgery (lumpectomy or mastectomy), followed by chemotherapy or radiation, begin.

Symptoms of Stage 2 Breast Cancer

In Stage 2, tumours are typically larger (2-5 cm) and more physically noticeable. You may feel a firm, distinct lump or swelling in the underarm lymph nodes. Keep an eye out for visible changes like skin dimpling, nipple retraction, or a persistent "tugging" sensation as the breast shape begins to shift.

Stage 3: Locally Advanced

Stage three breast cancer is more advanced. But it has not spread to distant organs. It is strictly local to the breast area, chest wall, or skin. 

• Characteristics: The tumour may be large, or it may have spread to several lymph nodes near the breastbone or collarbone.

While this stage requires aggressive treatment, it is still treated with the intent to cure.

Visible Signs of Stage 3 Breast Cancer

You may notice visible redness, swelling, or skin ulcers. The breast often feels heavy or inflamed, and the skin may appear thick and pitted, resembling an orange peel (peau d'orange).

Stage 4: Metastatic Breast Cancer

Stage 4 breast cancer indicates that the cancer cells have travelled through the blood or lymph system to other parts of the body, most commonly the bones, liver, lungs, or brain.

• Outlook: While rarely "cured" in the traditional sense, stage 4 is often managed as a chronic condition. Many women live full, active lives for years with stage 4 cancer by using targeted therapies to control the disease.

Signs of Stage 4 Breast Cancer

In Stage 4 (metastatic), symptoms extend beyond the breast to include persistent bone pain, a chronic cough, or extreme fatigue. You may also experience unexplained weight loss, headaches, or swelling in areas far from the original site.

Breast Cancer Stages: Quick Summary 

Conclusion

Early detection remains significant in the fight against breast cancer. Making a habit of monthly breast self-examinations is essential. By becoming familiar with the normal feel and shape of your breasts, you are much more likely to notice subtle changes early on. 

However, self-exams are most effective when paired with professional screening. Regular health checkups help you identify early changes that might not be felt by hand. Beyond detection, you can further lower your risk by maintaining a healthy lifestyle, which includes staying physically active, limiting alcohol consumption, and prioritising a nutrient-rich, balanced diet.

While lifestyle choices act as a precaution, they are not a guarantee. If you notice any breast cancer symptoms like a lump, persistent skin changes, or unusual discharge, do not wait for your next scheduled check-up. Please consult your gynaecologist immediately. A professional clinical exam and proper screening are the only ways to ensure an accurate diagnosis and peace of mind.

Frequently Asked Questions (FAQs)

Q: Is breast pain a sign of an advanced stage or just my period? 

Breast pain is usually cyclic mastalgia caused by period hormones. While pain is rarely an early-stage symptom, it can occur in Stage 3 alongside redness or swelling. If pain is sharp, stays in one spot, and persists after your period, see a gynaecologist to rule out progression.

Q: Does a lump always mean cancer?

No. Roughly 80% of breast lumps are benign. They could be cysts or other non-cancerous conditions. However, a doctor should always evaluate any new lump.

Q: What causes breast cancer?

There is no single cause, but factors like genetics (BRCA gene), age, and lifestyle play a role. Understanding breast cancer causes can help you make informed lifestyle choices to lower your risk.

Q: How fast does breast cancer progress?

It varies. Some types are slow-growing and take years to progress from Stage 1 to Stage 2, while aggressive types can spread more quickly. This is why annual screenings are so important.

Q: Can I live a normal life with Stage 4 breast cancer?

Yes. For many women, Stage 4 is treated like a chronic illness (similar to diabetes). With modern medication, many patients continue to work and travel while keeping the cancer under control.

Q: At what age should I start regular screenings? 

Most experts recommend starting annual mammograms at age 40. However, if you have a family history of breast cancer, your gynaecologist may suggest starting much earlier. Regular self-exams should begin in your 20s.