Unexpected Surgery Bill

When I was 18, I struggled with horrible knee pain which my doctor diagnosed as patella tendinitis. I tried anti inflammatory meds, physical therapy, and just ignoring it, but it got worse. He told me the last option was platelet rich plasma injections. He did warn that this may be labeled as experimental by insurance companies, but worse case scenario it would be $500 each knee or $1000 total. I had no money to pay for this but my parents agreed they would so I could go ahead with the surgery. About a year later, I got a bill in the mail for $10,000. My parents offered to pay a $1000 bill, but do not have this amount of money. I am a father myself as of 08/18/12, as well as a full time college student, and am in no way able to pay this bill. I called the doctors office, the hospital, and the insurance company to explain what happened, but all three said they can do nothing. I do not apply for low income insurance coverage. Is there any way I can sue or get out of paying this bill?