She was denied access by Israel to life-altering surgery abroad for more than six months.
Only after the publication of a Guardian article condemning her treatment were Mazyouna, her mother and her surviving sibling granted permission to leave - her father was not permitted to join them.
Their evacuation and specialist surgery at the El Paso children's hospital in Texas was facilitated by FAJR Scientific, an organisation that evacuates children in need of medical treatment from war zones.