Invasive mucinous adenocarcinoma---formerly mucinous BAC---Stage IV - 1272033

nanita484
Posts:2

My brother was diagnosed in April 2015 after many months of being treated for presumed PNA..

Now, I'm here to ask Dr. West for your honest and expert opinion....

My brother hasnt responded too well to the therapies hes been given already. His tumors are slowly progressing...
He is being treated at MD Anderson in Houston. Since his diagnosis, he was enrolled in an immunotherapy clinical trial with Pembrolizumab, (PDL-1 inhibitor) plus standard chemotherapy, Alimta (Pemetrexed) and Carboplatin since July. Unfortunately, as of last weeks CT scans, his tumors showed progression so they are removing him from the trial and seeing what the next best step would be.

He is EGFR,ROS, ALK, negative but KRAS positive.

The Oncologist at MDA are suggesting to possibly start him on another trial with a MEK inhibitor Selumetinib with Docetaxel which is being studied in KRAS+ NSCLC. They may also consider running more genetic testing...

Given the uncertainty, I was hoping to get your honest opinion-- recommendation....

I believe he has what was previously known as mucinous BAC and from what I have gathered in the literature its difficult to treat and not very common...

I was wondering if there is any new research/clinical trial for this type of lung cancer. I know unfortunately there is no real targeted therapy for KRAS+, like there is for EGFR+.
I have no doubts that MDA is a great place, but it also appears that they are not sure what the next best step is and are seeking opinion from someone at Dana Farber.
Just was hoping you could please give me your honest opinion, since you are one of few oncologist that appears to be expert in cases of invasive mucinous adenocarcinoma/mucinous BAC. Are there any new promising research/ potential trials for KRAS+ NSCLC? Mucinous BAC?

Sorry again for the long post and thank you so much again for your help and especially your time.

Forums

JimC
Posts: 2753

Hi nanita,

Welcome to GRACE. I'm sorry that your brother has not shown a better response to treatment so far, but I think it is good that he is at MD Anderson, since the oncologists there have access to the latest treatments, as well as connections to many of the top oncologists at other institutions, which is a valuable resource upon which to draw. Of course, the doctors at MD Anderson aren't the only ones who are well-connected, but there are many oncologists who do not have access to such a network of expert opinions.

This type of lung cancer, though not rare, is not seen by any individual oncologist very often. Dr. West estimated that "most oncologists who have treated about 3-5 patients with mucinous BAC in the last couple of decades", while those "who have more experience with BAC [have seen]10-20 patients with mucinous BAC in the past decade or two." - http://cancergrace.org/forums/index.php?topic=8756.msg91242#msg91242

In that same post, Dr. West stated:

"The real measure of benefit is prolongation of survival, and the only true way to assess that is to have a bunch of patients with mucinous BAC, give half chemo and the other half a placebo or just all of the supportive therapies but no chemo, and see whether the people who receive chemo live longer. Honestly, that trial will probably never happen."

So although that post is from 2011, since trials simply aren't being conducted in these small patient groups (it's difficult to assemble enough patients at any given time to test a specific therapy), unfortunately it's just trial and error to see what may work, with the choice of therapy perhaps guided by anecdotal evidence from oncologists who have treated a few more patients than the average oncologist. That's why the networking can be helpful. When my wife was diagnosed near the beginning of the EGFR testing era, her oncologist networked frequently to get ideas.

I hope that the next regimen works well.

JimC
Forum moderator

nanita484
Posts: 2

Thanks Jim! I am praying something works... Its been a difficult time for the family as he is just 36 years old, never smoked, not sure why and how this cancer happens. This all seems unreal, but trying to stay hopeful...
Thanks for your reply!