You had arthoscopic knee surgery and 10 days later you have extensive bruising from ankle to the high thigh is this normal?

No, this is dangerous, blood clots have formed in your leg veins from the ankle to the high thigh, this is serious and hospitalization is needed.

A prevention program should have been applied by your orthopaedic surgeon for prevention of such a situation.

This is not a medical professional advice, only a personal opinion