alt Hacker NewsHistoSonics has studies published with 50 patients. Their upcoming study with 5000 liver patients obviously will give more information, but we already have some.
And with that said, these studies are more relevant than the top of thread linking to a review from 2011 looking at papers from 2005-2006 for ultrasound cavitation causing metastases.
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>>> ... the study found that removing the parachute prior to jumping led to a shocking increase in mortality among skydivers.
When there's a clear causal mechanism, additional research that doesn't propose a clear resolution to the underlying problem doesn't negate the clear causal mechanism. Releasing a bunch of loose cancer into the body is a clear causal mechanism, so unless you're filtering it or killing the loose cancer somehow, I'm not sure what those studies could tell you that overcomes the underlying problem. And until they address that problem, it's going to be limited to a quality of life type application - stopping the tumor from killing you now with the certainty of metastasis killing you later.
...they also appear to have been acquired by an investment group this past year:
https://www.fusfoundation.org/posts/transformational-milesto...