Types of Breast Cancer & Treatment Options

Breast cancer is not a single disease. It can be classified based on cell characteristics and the presence of hormone or protein receptors. Understanding the subtype helps doctors choose the most effective treatment for each patient.

Main Subtypes of Breast Cancer

1. Hormone Receptor-Positive (ER+/PR+)

Cancer cells respond to estrogen or progesterone.
Treatment: Hormone therapy (Tamoxifen, Aromatase inhibitors).

Advantage: Responds well to treatment, better long-term outcomes.

2. HER2-Positive

Overexpression of HER2 protein, causing rapid tumor growth.
Treatment: Targeted therapy (Trastuzumab, Pertuzumab).

Advantage: Fast-growing, but effective drugs are available.

3. Triple Negative

No ER, PR, or HER2 expression.
Characteristics: Common in younger women, aggressive, higher recurrence risk.
Treatment: Chemotherapy, sometimes Immunotherapy.

Limitation: Fewer treatment options.

4. Luminal A & Luminal B

Luminal A: ER+/PR+, HER2-, slow-growing, good prognosis. Treated mainly with hormone therapy.
Luminal B: ER+/PR+, HER2+ or high proliferation rate. Requires combined treatment (hormone therapy + targeted therapy ± chemotherapy).

5. Other Rare Types

Examples: Inflammatory Breast Cancer (IBC), Paget’s disease.
Treatment: Combination of surgery, chemotherapy, radiation, targeted therapy.

Treatment Approaches

The doctor will choose a treatment method based on the type, stage, and health of the patient. The main methods include:

1. Surgery

Breast-conserving surgery
mastectomy

2. Radiation Therapy

Usually after surgery to destroy remaining cancer cells.

3. Systemic Therapy

Chemotherapy
Hormone Therapy
Targeted Therapy.
Immunotherapy (Immunotherapy)

Why Early Detection Matters

Different subtypes respond differently to treatment.
Early-stage detection significantly increases survival and quality of life.
Women aged 35+ should have annual breast screening and perform regular self-exams.