what is the pathophysiology of OSA ULNA L?

Question

What is the pathophysiology of ewing sarcoma?
Pt. had a small mass growth on his L hand, had an operation when he was 3 years old, then another mass growth 3 to 4 inches away from first site, had an operation at 5 yrs. old...due to financial constrain pt. didn't go back until his whole arm (left) is affected and is going to have an amputation a few weeks from now.

Answer 1

I am sorry to hear about the complicated outcome of this sarcoma. I wish him all the best, following links are quite elaborate and reliable, let me know if you need to know something more specific, good luck