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Breast Cancer 101

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Everything you'll need to know.

Were you recently diagnosed with breast cancer? Breast Cancer 101 is designed to help you sort through all of the information on our site to find what is more relevant to you right now.

The links below will direct you to the pages on that will help you understand test results, the individual characteristics of the cancer, treatments that are recommended for you, and more.

Chapter 1: Understanding Your Diagnosis

Multiple tests are done on the breast cancer tissue that was removed during biopsy or surgery to determine how the cells look and behave. The results of these tests make up your pathology report. Learn what the information in your pathology report means for your particular diagnosis in the following sections.

Your Diagnosis

Getting Your Pathology Report

Non-Invasive or Invasive Breast Cancer

Cell Grade

Rate of Cell Growth

Tumor Necrosis

Size of the Breast Cancer

Surgical Margins

Vascular or Lymphatic System Invasion

Lymph Node Involvement

Ploidy (Number of Chromosomes)

Hormone Receptor Status

HER2 Status

Triple-Negative Breast Cancer

EGFR Status

Tumor Genomic Assays

BRCA1 and BRCA2 Testing

Stages of Breast Cancer

What Does Prognosis Mean?

Your Diagnosis: Questions to Ask Your Doctor

My Profile

Chapter 2: Types of Breast Cancer

There are different types of breast cancer, depending on where the cancer started in the breast and whether it's invasive or non-invasive. Your pathology report tells you the types of breast cancer that was found during surgery. Learn more about your type from the appropriate section below.

DCIS — Ductal Carcinoma In Situ

IDC — Invasive Ductal Carcinoma

These are different subtypes of IDC that contain cancer cells that look and behave in a specific way. If you are diagnosed with a subtype of IDC, you can learn about it here.

ILC — Invasive Lobular Carcinoma

Inflammatory Breast Cancer

LCIS — Lobular Carcinoma In Situ

Male Breast Cancer

Paget's Disease of the Nipple

Phyllodes Tumors of the Breast

There are many treatment options available for women diagnosed with breast cancer that has come back (recurrence) or spread to another part of the body (metastasis).

Local Recurrence

Regional Recurrence

Metastatic Recurrence

Living with Metastatic Disease

Treatments for Metastatic Cancer

Chapter 3: Planning Your Treatment

Depending in your diagnosis, your doctor will recommend one or more treatments. Surgery, radiation, chemotherapy, hormonal therapy, and targeted therapy all fight cancer cells in different ways.

Learn what to expect from each treatment and questions you may want to ask your doctor about each treatment.

Getting a Second Opinion

Fertility Issues to Discuss Before You Start Treatment

Planning Your Treatment



Radiation Therapy

Hormonal Therapy

Targeted Therapies

Drugs for Treatment and Risk Reduction

Treatments for breast cancer all cause side effects that can affect your quality of life. Learn what to expect from treatment side effects and what you can do to manage them.

Treatment Side Effects


Are you interested in participating in a clinical trial, or does your doctor think you are a candidate for one? Find out what it means to participate in a clinical trial.

Clinical Trials

Additional Information

Complementary & Holistic Medicines

Talking to Your Family and Friends About Breast Cancer

Managing Your Medical Records

Breast Cancer and Your Job Podcasts Blog

Pictures of Breast Cancer

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