Breast Cancer

What Is Breast Cancer?

Breast cancer is a disease in which cells in the breast begin to grow abnormally and multiply in an uncontrolled way. These cells may form a lump or mass, but in some cases, breast cancer develops without a noticeable lump in the early stages. It can begin in different parts of the breast, most commonly in the milk ducts or lobules.

Breast cancer is one of the most common cancers affecting women, though men can develop it too. The condition can range from slow-growing forms that stay within the breast to more aggressive types that spread to nearby lymph nodes or other parts of the body if not treated early.

The good news is that breast cancer is often treatable, especially when found early. Regular screening, self-awareness, and timely medical evaluation can make a major difference in outcomes.

Types of Breast Cancer

Breast cancer is not just one disease. It appears in several forms, and the treatment approach depends on the exact type.

• Ductal carcinoma in situ (DCIS): A very early form of breast cancer where abnormal cells stay inside the milk ducts.

• Invasive ductal carcinoma (IDC): The most common type, beginning in the milk ducts and spreading into nearby breast tissue.

• Invasive lobular carcinoma (ILC): Starts in the milk-producing glands and may be harder to detect on imaging.

• Inflammatory breast cancer: A fast-growing and less common form that causes redness, warmth, and swelling.

• Triple-negative breast cancer: A more aggressive type that does not respond to hormone therapy or HER2-targeted treatment.

• HER2-positive breast cancer: A type that grows more quickly but may respond well to targeted therapies.

Signs and Symptoms of Breast Cancer

Breast cancer does not always cause symptoms at first, but some warning signs should never be ignored.

• A new lump in the breast or underarm

• Thickening or swelling in part of the breast

• Change in breast size or shape

• Dimpling or puckering of the skin

• Nipple discharge, especially if bloody

• Nipple pulling inward

• Redness, scaling, or irritation of breast skin

• Pain in the breast or nipple area that does not go away

Not every lump is cancer, but every new or unusual breast change deserves medical attention.

Why Does Breast Cancer Happen?

There is no single cause. Breast cancer develops when changes occur in the DNA of breast cells, causing them to grow faster than normal and avoid the body’s usual control systems. Some factors increase the risk, including:

• Increasing age

• Family history of breast or ovarian cancer

• Inherited gene mutations such as BRCA1 or BRCA2

• Early menstruation or late menopause

• Dense breast tissue

• Hormone replacement therapy in some cases

• Previous chest radiation

• Lack of physical activity

• Alcohol use

• Obesity after menopause

Having a risk factor does not mean a person will definitely get breast cancer. Many people with breast cancer have no strong risk factors at all.

Diagnosis of Breast Cancer

Diagnosis usually begins when a woman notices symptoms or when a screening test shows something unusual. A doctor may recommend one or more of the following:

• Clinical breast examination: The doctor checks for lumps, skin changes, or abnormal swelling.

• Mammogram: A specialised breast X-ray that can detect early tumours.

• Breast ultrasound: Helps determine whether a lump is solid or fluid-filled.

• Breast MRI: Used in selected cases for a more detailed view.

• Biopsy: A small sample of tissue is removed and examined under a microscope. This is the only way to confirm cancer.

• Hormone receptor testing: Shows whether the cancer may respond to hormone-blocking treatment.

• HER2 testing: Helps identify whether targeted therapy may be useful.

• Staging tests: If needed, scans are done to see whether the cancer has spread.

Early diagnosis often leads to more treatment options and a better chance of a cure.

Treatment Options for Breast Cancer

Treatment depends on the stage, type, and hormone status of the cancer, as well as the person’s overall health.

• Surgery: Removal of the lump or the whole breast, depending on the case.

• Radiation therapy: Uses high-energy rays to destroy remaining cancer cells.

• Chemotherapy: Medicines that kill rapidly dividing cancer cells.

• Hormone therapy: Used for hormone receptor-positive breast cancers.

• Targeted therapy: Focuses on specific cancer cell features such as HER2.

• Immunotherapy: May be used in certain advanced or triple-negative cases.

Some people may need one treatment, while others may need a combination.

Recovery and Follow-Up

Recovery varies depending on the treatment plan. After surgery, there may be pain, swelling, or limited arm movement for a short period. Radiation and chemotherapy can cause fatigue, nausea, hair loss, or skin changes, though these side effects are often manageable.

Long-term follow-up usually includes:

• Regular doctor visits

• Imaging tests when needed

• Monitoring for recurrence

• Emotional and psychological support

• Healthy lifestyle changes

When to Seek Medical Help

You should see a doctor promptly if you notice:

• A new breast lump

• Bloody nipple discharge

• Skin dimpling or redness

• A nipple that suddenly turns inward

• A lump in the underarm

• Any change in the breast that persists