These are worrisome symptoms and signs: severe pain in upper or lower limb, more by night, not relieved by regular pain killers and associated with swelling. Your child is not eating well and losing weight in short period of time.
If he presented to hospital at an early stage of the disease and treated according to standard protocols, his or her chance of complete cure will range between 60 to 70 % 5 years cure rate.
If he is diagnosed at an early stage with a small to moderately sized tumor, his or her chance of not having an amputation would be over 90 %.