After one of her chemotherapies seemed to shrink the thyroid cancer slightly, I even raised with her the possibility that an experimental therapy could work against both her cancers, which was sheer fantasy.

NEWYORKER: Letting Go

The shop was pursuing an experimental cancer therapy that many experts said couldn't possibly work.

FORBES: Targeting Tumors

An experimental gene therapy for AIDS languished for four years.

FORBES: Do-It-Yourselfer

DeLarge is eventually jailed for murder, during which time he undergoes an experimental aversion therapy developed by the government in an effort to solve society's crime problem - it causes him to suffer nausea whenever he contemplates an act of violence.

BBC: The history of the future in 10 images

Stem cell therapy today is experimental but promising.

FORBES: Cell makers