It is grim but the only way to stoop. It. I with I had had my right leg amputated with the first tumour. I had invasive resection. Lost femur and knee. And 3 quadriceps .

3 months later it had metastasised and there is no stopping it. There is no treatment. I now have 9 active tumours.
Early surgery is the only option. Please choose it for your boy.