Breast Cancer Types

Breast cancer is not one disease. The type - where it starts and what fuels it - decides treatment, which is why biopsy and receptor testing come before any plan.

By where it starts

• Ductal carcinoma: begins in the milk ducts - the most common type. DCIS (ductal carcinoma in situ) is the earliest, pre-invasive form: contained in the duct, highly treatable
• Lobular carcinoma: begins in the milk-producing lobules; can be subtler on imaging and touch

By what fuels it (receptor status)

• Hormone receptor-positive (ER/PR positive): fueled by estrogen or progesterone; the commonest kind; treated with hormone-blocking medicines (tamoxifen, aromatase inhibitors) for years
• HER2-positive: driven by the HER2 protein; aggressive but now highly treatable with targeted drugs (trastuzumab and others)
• Triple-negative: lacks all three receptors; fewer targeted options, treated mainly with chemotherapy; more common in younger women and BRCA1 carriers

Special presentations

• Inflammatory breast cancer: red, swollen, warm breast with orange-peel skin - looks like an infection but does not settle with antibiotics; aggressive and needs urgent specialist care
• Paget's disease of the nipple: persistent eczema-like nipple change with an underlying cancer
• Metastatic (stage 4): cancer that has spread beyond the breast and nearby nodes - treated as a controllable chronic disease in many cases, with honest goals

Benign look-alikes

Fibroadenomas (smooth, mobile "breast mouse" lumps of young women), cysts, and fibrocystic change are benign and common. They are distinguished by examination, ultrasound or mammography, and biopsy when in doubt - never by guessing.

The classical classification

Classical texts sorted breast lumps by character: Vataja (shifting, painful), Pittaja (hot, inflamed), Kaphaja (hard, pale, slow, painless), Medoja (soft, slippery, mobile) (Sushruta Samhita, Nidana Sthana 10). The soft, mobile Medoja reads remarkably like a fibroadenoma; the hard, fixed, painless Kaphaja like the worrying kind. Modern typing works through receptors and pathology instead - the classical instinct to read a lump's character was sound.