Always this "world youngest..."
I asked Dr. Sam Winter from the University of Hong Kong. He is doing alot of research in Thailand, Vietnam etc.
"With regard to transition histories, we found that many participants had transitioned very early in life, beginning to feel different to other males, and identifying as non-male by middle childhood. By adolescence many were living a transgendered life. Many took hormones, beginning to do so by a mean age of 16.3 years, and several from as early as 10 years. Many underwent surgeries of various kinds, on average in the twenties, with one undergoing SRS as early as 15 years."
copied from his publication "Thai transgenders in focus: demographics, transitions and identities."
regards Jaqueline