Alan Hart was an American doctor, radiologist, tuberculosis researcher, writer and novelist.

Hart grew up in Oregon, where his family largely accepted and supported his gender expression, allowing him to play with boys toys and wear boys clothes. In school, where Hart was forced to live as a girl, he wrote essays under a male name. He continued to do this at University - however his degree was issued in his female name, much to his disappointment.

In 1917, the same year he obtained his medical degree, he was one of the first trans men to undergo surgery and subsequently live the rest of his life as a man. He pioneered the use of X-ray photography in TB detection, and implemented screening programs that saved thousands of lives - TB being, in the early 20th century, the biggest fatal disease in America.

As an experienced and accessible writer, Hart wrote widely for medical journals and popular publications, as well as pursuing a second career, outside of medicine, as a novelist.

Source: Wikipedia

Check out more trans history on Gendered Intelligence’s ‘Trans History’ tag.