He likened them to Nazi doctor Josef Mengele, who carried out sadistic medical experiments on prisoners at the Auschwitz II-Birkenau concentration camp during the Second World War.

The Tesla and X owner was reacting to news that Fox Varian, who had a double mastectomy at age 16, won what is described as the first detransitioner malpractice lawsuit in the United States. Now 22, Varian said New York doctors had compelled her to undergo the surgery while she was still a minor.

Both a psychologist and a surgeon approved the procedure. A jury later found them liable for malpractice. Varian was awarded $1.6 million for pain and suffering and another $400,000 for future medical costs.

"There will be thousands of court cases of children who were mutilated by evil doctors, modern day Mengeles," Musk wrote on X on Saturday, sharing a post about the ruling.

"The schools, psychologists/psychiatrists and state officials who facilitated this will pay dearly too," he added.

Musk has previously spoken publicly about his own family's experience with the radical 'gender transition' movement. One of his children, Xavier, came out as transgender at 16 and later changed his name to Vivian Jenna Wilson.

The billionaire has claimed he was "essentially tricked into signing documents" by doctors, calling the practice "incredibly evil."

"I lost my son, essentially. They call it deadnaming for a reason," Musk said in earlier remarks, adding that Xavier had been figuratively killed by what he described as the "woke mind virus," which he vowed to "destroy."

Since returning to office, President Donald Trump has rolled back several policies introduced under his predecessor Joe Biden, including federal support for medical gender transition procedures for individuals under the age of 19. Several US states have also moved to restrict or ban such treatments for minors.