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If My Grandmother Had Breast Cancer, Will I Get It?

Guide:

You’re not alone in asking this question.

Many women with a family history of breast cancer, especially through a grandmother, wonder what implications that has for their future health. What’s the likelihood that the next generation will develop breast cancer too?

This is a perfectly normal concern for millions of American women. And at HerSpace in Little Silver, NJ, we’re here to offer clarity, support, and next steps that put your health first.

How Much Does Family History Really Affect Breast Cancer Risk?

First, let’s clear something up: most breast cancer isn’t inherited.

According to research from the National Institute of Health, only about 5–10% of breast cancer cases are considered hereditary and linked to gene mutations passed down through families.
That said, family history still matters.

If you have a first-degree relative (a parent, sibling, or child) with breast cancer, your risk is about twice as high as someone without a family history. If it’s a second-degree relative, like a grandmother, the risk is lower but still worth paying attention to, especially if there are multiple cases on the same side of the family.

Breast cancer doesn’t always skip a generation, but it can run in families. The key is understanding your full family history and using it to guide proactive care.

Can I Inherit Breast Cancer from My Dad’s Side Too?

Yes, absolutely.

One of the most common myths we hear is that breast cancer risk only comes from your mother’s side. But you inherit genes from both parents, which means your father’s side of the family matters just as much.

If your paternal grandmother had breast cancer, or if any relatives on your father’s side were diagnosed with ovarian or prostate cancer, those details could be important. BRCA1, BRCA2, and other cancer-related mutations can be passed down by either parent.

That’s why we recommend collecting a full family history (not just your maternal line) when discussing breast cancer risk with your doctor.

Should I Get Genetic Testing? Here’s When It’s Worth It

Genetic testing can conclusively identify mutations like BRCA1, BRCA2, and PALB2, which significantly increase the risk of breast and ovarian cancers.

Genetic counseling may be appropriate if:

  • You have multiple relatives with breast or ovarian cancer
  • A family member was diagnosed before age 50
  • You’re of Ashkenazi Jewish descent with a family history
  • A relative tested positive for a BRCA mutation
  • There is any male breast cancer in your family

Testing involves a simple blood or saliva sample and is often covered by insurance when medically indicated.

At Little Silver HerSpace, we work closely with local genetic counselors to guide patients through the process, offering education, emotional support, and clear next steps based on your results.

Risk Isn’t Just Genetic: What Else Should You Know?

If genetics is only a small part of the equation, then what else can increase the likelihood of developing breast cancer?

Other risk factors include:

  • Age (most diagnoses are after age 50)
  • Breast density
  • Hormone levels and reproductive history
  • Lifestyle factors like alcohol use, inactivity, and smoking
  • Environmental exposures

That’s why even women without any family history should follow regular screening guidelines. Early detection saves lives.

Your Next Step: Screening & Support in New Jersey

Whether you’re at average or increased risk, staying on top of your screenings is the best move you can make for your long-term health.

At HerSpace Mammography in Little Silver, NJ, we recommend annual mammograms starting at age 40 for average-risk women. Earlier or more frequent screenings are also recommended for those with increased risk based on family history or genetics.

Our facility offers:

  • Same-day results
  • Advanced 3D mammography
  • All-female technologist team
  • A calm, patient-centered experience

Explore our mammogram services or contact us here to schedule your screening.

FAQs About Family History and Breast Cancer

Can I get breast cancer if only my grandmother had it?


Yes, especially if other risk factors are present or there are additional cases on either side of the family.

Can breast cancer skip a generation?

It can. While some families see multiple cases in one generation, others may have a skipped pattern.

Should I get tested for BRCA if my grandma had breast cancer?


Possibly. If other family members also had breast, ovarian, or prostate cancer, especially at a young age, genetic testing may be appropriate.

What if I don’t know my family history? What should I do?


Even without a clear family history, regular screening is essential. A personal risk assessment with your provider can help fill in the gaps.

Breast Cancer Screening Backed by Expertise and Compassion

At HerSpace Mammography in Little Silver, NJ, we combine clinical excellence with personalized care. Our radiologists are board-certified, our facility is accredited by the ACR (American College of Radiology), and we’ve been serving New Jersey families for over a decade.

We’re proud to be a trusted partner in your breast health journey.

Ready to take the next step? Schedule your mammogram today.