A non-medical healer pretends to dig his hands into a person's innards, right through the skin without any incision, or with a fake incision made by running a finger along the patient's body, and then pretends to pull out `tumors'. Using trickery, the healer squirts animal blood from a hand held balloon while discarding items such as chicken livers and hearts. The patient then goes home to die, if they were really dying of cancer, or to live if there was nothing seriously wrong with them in the first place. This is big business around the world, but especially in the Philippines and Brazil.
further reading
Brenneman, Richard J. Deadly Blessings : Faith Healing on Trial (Buffalo, N.Y.: Prometheus Books, 1990).
Randi, James. Flim-Flam! (Buffalo, New York: Prometheus Books,1982), chapter 9.