Gender dysphoria in children
Gender dysphoria (GD) in children, also known as gender incongruence (GI) of childhood, is a formal diagnosis for distress (gender dysphoria) caused by incongruence between assigned sex and gender identity in some pre-pubescent transgender and gender diverse children. The diagnosis Gender dysphoria in children is defined in the 5th edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM), and Gender incongruence of childhood is defined in the 11th edition of the International Classification of Diseases but considered a physical rather than psychiatric condition.
Source: Wikipedia — Gender dysphoria in children (CC BY-SA 4.0)