According to a former camp inmate, an 18-year-old Jewish youth came to the clinic with a foot inflammation. He was asked by Heim why it was that he was so fit. He replied that he had been a soccer player and swimmer. Instead of treating the prisoner's foot, Heim placed him under anesthesia, cut him open, took apart one kidney, removed the second and castrated him. The boy was decapitated and Heim boiled the flesh off the skull so it could be displayed, the former inmate said.
And how many others did he repeat the experiment, without anesthesia?