[Timsky]

Usually, it suffices to initiate apoptosis, the self-destruction mechanisms of the cells.

[elric]

I doubt ultrasound would trigger apoptosis in cancer cells, one of the reasons they're cancerous is that they refuse to commit suicide when they should.

[snovv_crash]

It heats them until enough damage is done that they die regardless.

[patall]

So more like necrosis, not apoptosis. Maybe non-biologists are not aware, but apoptosis is not just cell death.

[hgomersall]

Or just tears them apart in the case of Histosonics.