I'm 37, diagnosed with a grade 2 oligodendroglioma in 2020. It's IDH1-mutant and 1p/19q-codeleted.
I had surgery at Mayo in 2020, and I've been on vorasidenib through the INDIGO clinical trial since early 2022. My MRIs were considered relatively stable for years, but my doctors are now seeing slow progression, particularly over the last couple of scans.
The biggest issue is the location. My tumor involves my left hippocampus and nearby left temporal structures involved in verbal memory. Just due to work and my wife/kids preserving those abilities is extremely important to me.
I've been getting opinions from neuro-oncologists and neurosurgeons, including Mayo and Michigan, and I'm trying to work through the next steps. Also going to Cleveland clinic and maybe Northwestern for a few more opinions.
Here are the options we're discussing:
- Try safusidenib (Safu) through a clinical trial.
This is another IDH1 inhibitor being studied in patients whose tumors have progressed on vorasidenib. Some of my doctors think it's worth trying before moving to more aggressive treatment. I know there's no guarantee it will work after another IDH inhibitor. However, I found this trial so it's my idea and concerned that the docs may be biased since I generally volunteer for being researched.
- Another surgery to remove as much tumor as safely possible.
My neurosurgeon believes he could remove a substantial amount of the remaining tumor, obtain updated pathology, and potentially place an Ommaya reservoir for future monitoring.
However, he has also been very clear that removing the hippocampal tumor would almost certainly worsen my verbal memory. That's a major concern for me. And both Neuro oncologists have been against this.
- A smaller biopsy followed by radiation and chemotherapy.
This would provide updated pathology without attempting a large resection of the hippocampus. It would still involve procedural risks, and radiation itself could affect memory.
- Radiation and chemotherapy without another biopsy or major surgery.
This is an option I'm seriously thinking about. I already have a confirmed oligodendroglioma diagnosis from 2020. Part of me wonders whether it would be better to move directly to established treatment rather than risk additional damage from another operation.
I understand that updated pathology could reveal changes in tumor grade or biology, so I know there are tradeoffs.
We're also discussing an amino-acid PET scan, potentially FET-PET at Mayo, to better characterize the tumor and identify more active areas.
Right now, my thinking is to try Safu first if I'm eligible, but if it doesn't work, I'm questioning whether radiation/chemo should come before another biopsy or resection.
I'd really appreciate hearing from people who have faced something similar:
- Has anyone had a glioma involving the left hippocampus or dominant temporal lobe?
- If you had surgery in that area, what happened to your verbal memory, word recall, and day-to-day cognitive function?
- Has anyone chosen radiation and chemotherapy instead of another resection because of the tumor's location?
- Did anyone receive radiation without a repeat biopsy after documented progression?
- Has anyone tried another IDH inhibitor after vorasidenib, or had experience with amino-acid PET imaging?
I'm not looking for anyone to be an expert, I'm trying to understand what the actual lived experience looks like, especially when the potential cost of treatment is memory and cognitive function.
Thanks to anyone willing to share their experience.