Got asked this by my buddy J. last week when I mentioned my doc brought it up during follow-up. So yeah, ttfields is being used for lung cancer now. FDA approved it a couple years back for non-small cell lung cancer, the most common type.
Here's what I understand. The device uses electric fields to mess with cancer cell division. It's not chemo, not radiation. You wear these electrode pads and they send these low-intensity waves through your body. Sounds like science fiction but the data seems solid.
For meso specifically it's trickier. Pleural meso is different from lung cancer even though they're both in the chest. My oncologist at EVMS said the clinical evidence for meso with ttfields is still being built out, meaning they're still running trials to see if it actually helps us the way it helps lung cancer patients. With lung cancer they've got more data points and clearer response rates.
I asked about getting into a trial for it back in August after my pleurectomy and they said I wasn't a good fit yet given my stage and post-op status. Timing matters. The guys who benefit most seem to be the ones with good performance status and stable disease, which makes sense.
If your doc mentions it, ask them straight up what the evidence looks like for your specific diagnosis. Don't let them skip that part. It's a tool but it's not magic and it works different depending on what you've got going on.