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tumor treating fields - what actually is this and would it help my dad

Family · · 3,610 views
So my dad was just told about TTFields as an option and honestly I looked it up because I'm a nurse practitioner but the marketing stuff is so dense I wanted to understand it from someone who's actually dealing with meso.

From what I can gather it's basically these electrode pads you wear that deliver low-intensity electrical currents to disrupt cancer cell division. The idea is the fields interfere with microtubule formation during mitosis so the cells can't divide properly. It's FDA approved for glioblastoma first, then they started looking at it for pleural meso a few years ago.

But here's what I'm trying to figure out: is this actually being used as a real treatment option for Stage IV pleural or is it still mostly in the clinical trial phase? Because my dad's oncologist at Northwestern mentioned it almost casually, like it's just another thing we could add to palliative care, and I got the sense he wasn't super enthusiastic about it.

Has anybody's parent or family member actually done TTFields for meso? I want to know what the actual commitment is like, side effects, whether insurance covers it, and honestly whether anyone's seen meaningful response. My dad's already exhausted from everything else and I don't want to push something that's just going to add burden without real benefit.

Any real experience out there?

8 Replies

Patient
yeah my oncologist mentioned it too but honestly i never went for it, just felt like one more thing to strap on when i was already beat up from the epp and chemo tune-up. heard it works better for brain stuff than meso anyway.
Family
I haven't dealt with TTFields myself since my mom's Stage III, but I've been going to her oncology appointments here in Phoenix and honestly the oncologist brought it up kinda the same way yours did, Carl. Like it was there if we wanted it but not like "you absolutely need this." Mom was already so tired from the cisplatin and pemetrexed combo that we decided against it too.

What I will say though is the commitment part is real. My best friend from college, her dad did the pads for a few months at Mayo and he had to wear them like 18 hours a day, and the skin irritation was pretty gnarly. Plus she said trying to manage insurance coverage was its own nightmare because some plans treat it different depending on whether it's being done alongside active chemo or just as maintenance.

I think the thing that stuck with me was what his oncologist said at the end, that TTFields was more about extending progression-free survival, not like a game changer. So if your dad's already dealing with side effects from other treatments, adding something that requires that much daily commitment for maybe a few extra months might not be worth the exhaustion. That's just what we felt made sense for our situation though. Everyone's different and your dad's oncologist would know his specific case better than anyone on here obviously.
Veteran
I didn't do TTFields but my oncologist at UCSD brought it up same way yours did, kinda like a checkbox item. Here's what actually swayed me away from it though: I was already six weeks post-EPP in December when he mentioned it, still dealing with the surgical pain and just starting to breathe better, and the commitment is real. You're wearing these electrode pads basically all day every day, gotta keep them on your chest, can't shower normally, and yeah insurance coverage is spotty depending on your plan. The data on pleural meso specifically isn't as solid as what they have for glioblastoma. What pushed me harder was talking to another vet at the VA clinic who tried it for a few months and said he felt like it was just one more thing wearing him down without seeing any actual change in his scans. Your gut on your dad being exhausted already is probably telling you something real. If his oncologist isn't enthusiastic that's usually the tell, you know?
Family
We looked at TTFields for my dad back in August, right after his oncologist at Northwestern mentioned it too. I actually called the device company directly because I wanted specifics that weren't in their glossy brochures, and honestly the conversation was kind of illuminating in what it revealed.

So here's what I learned: it's FDA approved for mesothelioma but the real world adoption is still pretty limited. The clinical trial data looked promising for progression-free survival in certain subsets, but Stage IV is a different animal. The device itself is a vest with electrode arrays that you wear pretty much constantly, like 18+ hours a day ideally. My dad was exhausted just thinking about it. You're looking at scalp irritation where the pads contact skin, fatigue that's hard to separate from the cancer fatigue, and honestly the logistics of wearing it while managing everything else he was already doing with chemo rounds and symptom management.

Insurance coverage is spotty. We have decent coverage through my employer and even then it was going to be out of pocket upfront with maybe reimbursement later. I don't remember the exact number but it wasn't cheap.

What actually made us decide against it: my dad's oncologist, when I pushed him on it the way you're describing, admitted that the data for Stage IV pleural specifically wasn't robust enough that he'd recommend it as a priority over optimizing his current regimen. He said if my dad was earlier stage and wanted to be aggressive about it, sure, but at that point we were already in palliative territory and adding more hardware felt like it was working against what we were actually trying to do.

Your instinct about not adding burden without clear benefit is solid. That's the clinical thinking and also the human thinking colliding in exactly the right way.
Family
Joe hasn't done TTFields but his oncologist at Moffitt mentioned it back in January when we were exploring everything. The thing is, Joe was already on immunotherapy and we kind of felt like we were throwing everything at the wall, you know? So we asked a lot of questions and honestly the doctor seemed a little lukewarm about it too, which told us something.

From what I gathered talking to the nurses there, it's real and it's being used but it's not like this miracle thing people sometimes hope for. The commitment is actually pretty significant because you're wearing this vest with electrodes for like 18 hours a day. That's a lot when you're already dealing with fatigue and everything else meso throws at you. We heard from another patient in the waiting room whose husband tried it for a couple months and he just couldn't keep it up. The skin irritation underneath got pretty bad and he was exhausted.

Insurance does cover it but you have to fight for it sometimes. I taught for 35 years so I know how to work a system, and even I found the paperwork frustrating. The real honest answer I got from talking to people was that it might help some folks but we didn't see enough evidence yet that Joe should add that burden on top of his current treatment plan. He's responded well to the immunotherapy so we stuck with that.

Your dad's exhaustion is real and it matters. Is he on chemo or immunotherapy right now?
Veteran
Ran into that same pitch at the VA back in 2025, my oncologist said the data on meso wasn't there yet compared to glioblastoma. Your gut's probably right about the casual mention, that's usually the tell.
Medical Expert Response
Your instinct to dig deeper here is the right one, and the fact that you're a nurse practitioner actually puts you in a good position to parse what I'm about to say.

So the STELLAR trial is the one that really moved TTFields for pleural meso into clinical conversation. Published in Lancet Oncology in 2019, it showed median overall survival of 18.2 months when TTFields was combined with chemotherapy, which compared favorably to historical controls. But, and this matters, it was a single-arm trial, no randomization, so the oncology community has stayed cautiously interested rather than enthusiastic. That ambivalence you picked up from the Northwestern doctor is pretty standard right now.

What I tell families honestly is that the practical burden is real. We're talking 18 or more hours per day wearing the device, electrode pads that need to be changed, skin irritation that ranges from mild to genuinely uncomfortable, and the device itself is bulky. For someone already fatigued from prior treatment, that's not nothing. It's not chemo-level toxicity, but it's a constant presence.

On insurance, Novocure (the manufacturer) has a patient services program and I've seen it covered under Medicare and some commercial plans for the meso indication, but coverage is genuinely inconsistent and the appeals process can take weeks. I'd call them directly before your dad gets too invested in the idea.

Stage IV pleural with fatigue and prior treatment burden... the honest question his oncologist should be answering is whether the potential survival benefit outweighs what it costs him in quality of daily life. That's not a rhetorical question, it's a real clinical one only his team can answer with full context. Please do push that conversation with them.
3 found this helpful
Family
Yeah I caught that about STELLAR being single-arm, which is exactly why I was skeptical when the oncologist brought it up so casually. The historical control comparison is better than nothing but not the same as having a real control group, you know? And 18.2 months median OS - I mean that's not nothing, but I need to know if that's actually because of TTFields or just the chemo doing the work. Did you see any breakdown in the trial about response rates specifically to the fields themselves, or was it pretty much impossible to tease apart? My dad's already on palliative chemo so I'm trying to figure out if adding the device would actually give us anything extra or just another thing to manage during what's left.

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