A year-old transgender woman is referred for a screening mammography prior to nipple sparing mastectomy to remove painful masses caused by free silicone. Experiences of transgender-related discrimination and implications for health: Since then, treatment has evolved with improved sex reassignment surgery, refined hormonal treatment,  and more attention to psychosocial care that might have improved the outcome. The consequences of that decision will last a lifetime and we can never know because we impatiently failed to explore all avenues, if was really necessary or ultimately desirable for that child. Then she got a scholarship and went to college.
Yet there are more than five times as many adult as child gender identity patients in the UK.
Recommendations on age to start and interval varies across organizations. From Wikipedia, the free encyclopedia. J Clin Endocrinol Metab
Hormonal and surgical treatment in trans-women with BRCA1 mutations: