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Topic: NBN Genetic Mutation...anyone else?

Forum: Positive Genetic Test Results —

BRCA 1 & 2, ATM, CDH1, CHEK2, MRE11A, NBN, p53, PALB2, PTEN, RAD50, RECQL, and RINT1 genes

Posted on: Mar 2, 2015 07:50PM - edited Mar 2, 2015 08:09PM by margodae

margodae wrote:

Hello,

I was diagnosed with breast cancer at age 29. Genetic testing was brought up shortly after my diagnosis. I decided against it, at the time, for several reasons...the cancer institute in the city I live does not have a genetic counselor so I would have had to travel 5+ hours for this, no family history of breast cancer, etc.

Now, five years later, my original oncologist has retired and I have become established with a new one. In November, my new oncologist brought up having genetic counseling/testing. I was kind of surprised since it has been five years since my initial diagnosis and I have been cancer free. But, I guess it is never too late. After some thought and discussion with my family, I decided to pursue it. I traveled to Fargo, ND (where my parents live) and met with a genetic counselor. Even though I have no family history of breast cancer, I do have several other types of cancer in my family. My genetic counselor recommend testing for a 21 gene panel. This was on December 31. I got the results 4.5 weeks later and the only genetic mutation I tested positive for is NBN. This gene mutation is more recently discovered and so there is not a lot of information out there. I have been told it is linked to not only breast cancer, but also ovarian, melanoma, leukemia, and prostate cancer. I meet with my oncologist later this week to go over the results.

I'm just wondering if anyone else has tested positive for this gene mutation and what was recommended, if anything?

Thanks for any info!

Margo

Dx 9/11/2009, IDC, 1cm, Stage I, Grade 2, 0/7 nodes, ER+/PR+, HER2+
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Jun 2, 2015 12:14PM - edited Jun 2, 2015 12:14PM by KristyS120

hi Margo

I found out I have a nbn mutation about one month ago. I underwent the panel testing due to high incidence of breast cancer in my family. I am highly considering a bilateral mastectomy. Would love to know more about your journey...

Kristy

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Jun 2, 2015 01:03PM Moderators wrote:

Hi Kristy and welcome to Breastcancer.org,

Since Margo's post is from early March, she might not see your post -- you may want to send her a private message by going to her profile (clicking her username), and clicking send private message.

We hope this helps and good luck with your decisions!

--The Mods

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Jun 2, 2015 08:33PM margodae wrote:

Hi Kristy,

Thank you for responding to my post. I am sorry that you have also tested positive for an NBN mutation. Since there is so little information out there about it, I'm curious what you have been told?

I have been meeting with my doctors and have been having discussions regarding a bilateral mastectomy and a hysterectomy. No decisions have been made, just gathering information and opinions, at this point.

Margo

Dx 9/11/2009, IDC, 1cm, Stage I, Grade 2, 0/7 nodes, ER+/PR+, HER2+
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Jun 2, 2015 10:07PM Jumpship wrote:

I was told it was a 2 fold risk.

Negative for 16 of 17 gene markers. Positive for NBN-marker of unknown significance. Dx 7/2/2014, IDC, Left, 2cm, Stage IIA, Grade 2, 0/4 nodes, ER+/PR+, HER2+ (FISH) Surgery 9/30/2014 Mastectomy: Right; Prophylactic mastectomy: Left; Reconstruction (left): Tissue expander placement; Reconstruction (right): Tissue expander placement Targeted Therapy 11/21/2014 Herceptin (trastuzumab) Chemotherapy 11/21/2014 Carboplatin (Paraplatin), Taxotere (docetaxel)
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Jul 26, 2015 04:59PM Lyndsey wrote:

I just received the results of my test of 20+ potential gene mutations. It shows that I have NBN gene mutations. I took the test because I have a strong family history of breast cancer (sister, mother, grandmother) and colorectal cancer (maternal grandfather and his siblings, mother, and sister). I have dense breast tissue, which I understand is a concern, and am on replacement hormone therapy. I have not yet talked to my doctor or oncologist, but from Margo's and Kristy's very helpful comments I wonder if a bilateral mastectomy is a prudent and approved course of treatment for someone with this gene mutation, while not as severe as other gene mutations, and with a strong family history of breast cancer. Is a preventative mastectomy something that oncologists are beginning to recommend for this gene mutation? Is chemoprevention ever used for NBN gene mutations? I realize that MBM mutations are new to breast cancern treatment and prevetion. Your comments are very helpful, and I appreciate your sharing what it is like to have this mutation.

Lyndsey

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Jul 26, 2015 06:53PM Moderators wrote:

Hi Lyndsey,

Sorry you are here with any concerns, but hopefully we can be a support and help. In case you haven't read this, you may want to take a look:

Prophylactic Mastectomy

Family History

Is Prophylactic Ovary Removal Right for You?

Please keep us posted!

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Feb 28, 2016 12:24PM Linny50S wrote:

I have a very strong family history of breast cancer and tested positive for NBN mutation. All of my maternal aunts (2) and my mother had breast cancer and later died. I had my mother bank her blood in case another gene mutation was discovered (she did not have BRAC). Her blood tested positive for the NBN mutation. All of my maternal cousins (4) have/have had breast or prostate cancer, linked to NBN and 2 cousins were tested and found to be NBN positive. My youngest sister is also NBN positive. My younger brother tested negative. My younger brother has had colon cancer at age 54 and my younger sister died of colon cancer at 55.I had a prophylactic bilateral mastectomy on Sept. 9, 2015 with reconstruction started. It is now Feb. 28, 2016 and I have to wait until March 24th for my implants, due to having to have my expanders replaced because of a leak and not loosing my drain tubes until Dec. 29th! I do not regret the mastectomy but I hate the pain and discomfort of these expanders. Reconstruction is not for the faint of heart.

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Feb 28, 2016 12:27PM - edited Feb 28, 2016 12:27PM by Linny50S

This Post was deleted by Linny50S.
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Feb 28, 2016 07:22PM Jumpship wrote:

Is the NBN linked to colon cancer too? What's the increase of likelihood? I need to go and look at the symptoms.

Negative for 16 of 17 gene markers. Positive for NBN-marker of unknown significance. Dx 7/2/2014, IDC, Left, 2cm, Stage IIA, Grade 2, 0/4 nodes, ER+/PR+, HER2+ (FISH) Surgery 9/30/2014 Mastectomy: Right; Prophylactic mastectomy: Left; Reconstruction (left): Tissue expander placement; Reconstruction (right): Tissue expander placement Targeted Therapy 11/21/2014 Herceptin (trastuzumab) Chemotherapy 11/21/2014 Carboplatin (Paraplatin), Taxotere (docetaxel)
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Apr 3, 2016 02:45PM MomCof3 wrote:

I have a very strong family history of many cancers. I started getting mammograms quite early. Having extremely dense breast and always abnormal results. I've had several biopsies and decided I wanted to take preventative measures and opt for the bilateral masectomy with reconstruction. My insurance company would not approve the surgery because there was no cancer. Although I had been treated for cancer cells on my cervix and uterus, not to mention the polyps removed during my colonoscopies. The insurance company wanted Braca1 and Braca2 only. My oncologist pushed for the 32 gene since I've had so many issues and the family history is strong. Received my results and tested positive for hereditary mutation of the NBN gene. Had my oncologist wasn't persistent this is information I wouldn't have never known. Needless to say the surgery was approved and I had the DIEP FLAP with immediate reconstruction. It's only been a month and I'm coming along. Now the talk of a hysterectomy has been introduced and I have also decided to get it done after I am healed from this surgery. The doctor has also explained that there is a 50% chance I could have passed this gene on to my daughters and suggest they get tested as well as my grandson. I am pleased with my decision but this has been a scary journey.

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Apr 3, 2016 07:14PM Moderators wrote:

It sounds like a very scary journey, indeed. You must feel remarkably proud for how you have handled your situation. Depending on your daughters' ages, a conversation could be very helpful. Please let us know what happens!


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Jul 11, 2017 02:26PM TruffleShuffle1982 wrote:

I understand that this thread is an older one, but I just wanted to chime in anyway just in case some other people are looking for information on the NBN mutation. It's hard to find Much on this mutation. I tested positive for the NBN mutation and for APC variant of unknown significance. I decided to test on the myriad 20+ gene panel because of my extensive family history of breast, ovarian and other types of cancers. My mother tested, she has yet to receive her results, but her family has the long history of breast, colon, and other cancers. Two of my nine sisters tested, younger sister came out all clear, older sister hasn't received her results. Anyway, I've always had anxiety inducing mammograms. I've always received the "call back", had sonograms ordered, and "problematic spots". I had a prophylactic bilateral salpingectomy (fallopian tube removal) a year ago. And am seriously considering prophylactic BMX. I can't do the dreaded mammo/sono/call back/MRI every six months for the rest of my life. I also started colonoscopies early even though it doesn't say for certainty that this genetic mutation elevates colon cancer risks... the APC does, but its variant of unknown significance. People with the NBNgenetic mutation do seem to have a family history of colon cancers. This all can be so confusing. Anyway, just putting my experience with this gene mutation out there if it will help anyone else. If you're reading this, I wish you peace with whatever you decide to do to deal with this mutation.

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Jul 15, 2017 01:28PM Peregrinelady wrote:

I had genetic testing and the only thing that came up was APC - uncertain clinical significance, but my counselor didn't say anything about colon cancer. My twin sister died of breast cancer, my father of pancreatic, and my uncle of colon. Is there a connection between APC and colon cancer? Just asking because I have had adenomas in my colon previously. Thanks for any info you can steer me to!
Dx 4/24/2015, IDC, Left, 2cm, Stage IIB, Grade 2, 1/2 nodes, ER+/PR+, HER2- Hormonal Therapy 6/1/2015 Liquid tamoxifen (Soltamox) Surgery 4/18/2016 Mastectomy: Left, Right; Prophylactic ovary removal; Reconstruction (left): DIEP flap; Reconstruction (right): DIEP flap Hormonal Therapy Arimidex (anastrozole)
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Jul 16, 2017 10:00AM TruffleShuffle1982 wrote:

Peregrinelady,

I was told that the APC (Adenomatous polyposis coli) is a protein that is encoded by the APC gene in humans. And that mutations in the APC gene may result in colorectal cancer. APC is classified as a tumor suppressor gene. Keep in mind this is all sterile medical talk that sounds super scary. Let your health care providers know about the results of your testing. And make sure you all have a screening plan in place- i.e. Keeping up with your annual colonoscopy etc etc. Because we both seem to have come up with a "variant of unknown significance" or "unknown clinical significance" it seems that they don't know whether or not the mutation they detected in our APC gene puts us at higher risk for colon cancer per se. It just let's us know that we DO have a mutation in this gene, just not the mutations they have found and studied extensively to conclude that it actually increases risk for colon cancer or forming polyps?? It can get confusing, and induce a lot of anxiety. I just look at it this way, my maternal grandfather had colon cancer, and my mother has had polyps removed at many annual colonoscopies- so this little blip on my genetics results wasn't an enormous surprise. I started colonoscopies earlier than most people anyway just based on those facts alone. The positive unknown significance just reassured me that was the right choice.

These positive genetic results can be so scary. I feel for everyone who gets that positive. We just all have to remember that it doesn't have to be a punch in the gut, but maybe a firm push in the right direction? ((((Hugs to all))))

Below I'm including a link to a site that helped me understand a little bit about my results. It goes directly to the APC gene, but you can search other genes.

mysupport360.com/apc-gene-muta...

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Jul 16, 2017 10:12AM TruffleShuffle1982 wrote:

Upon further investigation I noticed this article says "high risk of developing PRE-cancerous polyps in the colon". Which is exactly what my mom has experienced. Precancerous polyp removal at several colonoscopies. And her father developed colon cancer. I'm not going to try to set up a lecture podium about cancer, because it can literally happen to anyone regardless of lifestyle/diet- BUT I will say that my grandfather was like a character from An old western sitcom- he NEVER went to the doctor, he didn't trust them. And his diet consisted of vienna sausages, velveeta cheese, and canned soup..... he smoked three packs a day prior to being diagnosed with cancer. So, he may have been able to catch his cancer before it even occurred had he been more vigilant with his health and dr checkups. Having the opportunity to test our genes is kind of a double edged sword. It is scary, but at the same time we have this knowledge to work with. Anyway, I talk too much. Lol best to all

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Jul 16, 2017 11:32AM Peregrinelady wrote:

Truffle, thank you so much. Everything you said makes sense to me since I have had precancerous polyps. I have had 2 colonoscopies, first 10 years ago (polyps found), then 5 years ago (nothing found.). So surgeon said I needed another in 5 years which is this summer. However, my PCP said 5-10 years. Complicating issues is the fact that I am on warfarin after a pulmonary embolism last summer. My gut says I should get the colonoscopy now but I am scared with the whole blood clotting problem. I think I need to share your information wish PCP and get it sooner rather than later. Thanks!
Dx 4/24/2015, IDC, Left, 2cm, Stage IIB, Grade 2, 1/2 nodes, ER+/PR+, HER2- Hormonal Therapy 6/1/2015 Liquid tamoxifen (Soltamox) Surgery 4/18/2016 Mastectomy: Left, Right; Prophylactic ovary removal; Reconstruction (left): DIEP flap; Reconstruction (right): DIEP flap Hormonal Therapy Arimidex (anastrozole)
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Jul 16, 2017 01:10PM TruffleShuffle1982 wrote:

I'm definitely happy to help. If you feel you should have the screening earlier, that's your call, & doc should be able to work with your concerns.


((Hugs))

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Aug 11, 2017 05:33PM trina21 wrote:

My genetisist at UCSD instructed me to NOT get mamaograms. NBN gene causes severe radiation sensitivity. Basiclly mamograms will give you breast cancer. Mt mothers doctors in NYC gave her the same advice. She has breast cancer and NBN. I have NBN too. You should get MRIs and Ultra sound unless they find a lump, then only do mamaograms to verify cancer

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Aug 11, 2017 05:36PM trina21 wrote:

YES it causes colon cancer. My grandfather had it

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Aug 11, 2017 05:44PM trina21 wrote:

My mom and I both have NBN. My sisters will be tested soon. We are sure they have it too since they have melenoma (NBN causes Melenoma) and their daughters have melenoma too. My son is being tested. He are sure he has it to because he has Lymphoma (NBN causes Lymphoma). My 2 daughters are being tested in placed into the cancer prevention program at Rady childrens hospital. My grandpa had colon cancer (NBN caused) and my mom has breast cancer (NBN) that's 4 generations of NBN all with cancer. EVERYONE WITH NBN NEEDS TO HAVE THEIR CHILDREN TESTED!!!

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Aug 12, 2017 02:19PM Moderators wrote:

Trina, that's quite the family history. Thank you for sharing your story.

--The Mods

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Sep 12, 2017 05:49PM Shari-Ann wrote:

I have the NBN gene mutation too. I've had breast cancer and melanoma. My kids and grandkids have had melanoma and lymphoma,. I had a lumpectomy and soon to have ovaries out. I took hormone replacement therapy for years before I knew about my genetics. You should avoid that when you reach menopause

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Sep 14, 2017 04:43PM TruffleShuffle1982 wrote:

I'm so glad more people have found their way to this thread to tell their stories (not glad under the circumstances we all find ourselves here though). It is difficult to find many people with this particular genetic mutation. Thank you all for speaking out.

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