Sir Harold Gillies
New Zealand
1882 - 1960
In 1946, Sir Harold Gillies and a colleague carried out one of the first female-to-male sex reassignment surgeries on Michael Dillon. In 1951 Gillies and colleagues carried out one of the first modern male-to-female sex reassignment surgeries using a flap technique on Roberta Cowell, which became the standard for 40 years.