The foreign quack clinics remind me of the disclaimer at the end of tacky TV infomercials: "Not sold in any store!"
In the Philippines they have "psychic surgeons" who remove tumors without using a scalpel.
Predictably, the FDA refuses to recognize their science.
There's certainly quack clinics, both over seas and here in the states as well. Although through regulation we're certainly protected from some of the extremist quackery.
I do not believe the FDA doesn't regulate surgical techniques. While having quite the plethora of areas under the public health umbrella to oversee; they're primarily in charge of food safety, pharmaceutical drugs, tobacco, supplements, medical devices, etc.
Not but a few years ago, in the time frame I mentioned earlier, I'm sure you recall the backlash against stem-cell treatment in this country. There were those without more than a cursory of knowledge, whom were stating that it's all based on dead babies and against God. It's certainly nice to hear that America's medical community has finally been able to work around the legislation put up to block the practice/research. Of course it's taken nearly a decade apparently.