Gavin Glynn's father's paying tribute to his son's doctors in the US.
The four year old underwent surgery lasting more than 11 hours in Texas this week, after raising hundreds of thousands of euro to fund his cancer treatment.
Surgeons removed two massive tumours from his body without having to remove any of his organs.
He's now recovering in intensive care.
Gavin's Dad John says the doctors are in no rush to send him home:
