Sex reassignment surgery (SRS), also known as gender reassignment surgery (GRS) and several other names, is a surgical procedure (or procedures) by which a transgender person's physical appearance and function of their existing sexual characteristics are altered to resemble that socially associated with their identified gender. It is part of a treatment for gender dysphoria in transgender people.
Professional medical organizations have established Standards of Care that apply before someone can apply for and receive reassignment surgery, including psychological evaluation, and a period of real-life experience living in the desired gender.
Feminization surgeries are surgeries that result in anatomy that is typically gendered female. These surgeries include vaginoplasty, feminizing augmentation mammoplasty, orchiectomy, facial feminization surgery, reduction thyrochondroplasty (tracheal shave), and voice feminization surgery among others.
Masculinization surgeries are surgeries that result in anatomy that is typically gendered male. These surgeries include chest masculinization surgery (top surgery), metoidioplasty, phalloplasty, scrotoplasty, and hysterectomy.