The most notorious FDA reveral was in 1992. The FDA's convenened expert panel..no plastic surgeons..voted to keep the silicone gel breast implants on the market. David Kessler the then head of the FDA unilaterally decided to put a moratorium on gel implants which restricted 90% of their use. Kessler's reasoning was based on his notion of risk-benefit. He set the benefit for breast implants at zero...
This action set some one plus women who had been previously implant into a frenzy of worry, triggered a $4 billion settlement against gel manufacturer Dow Corning, put all but two of the fifteen or so implant makers out of business, and raised the cost of gel implants from $200/pair to $2000/pair...