Sometimes you need help to fight against insurance decisions. Here is an example of a synovial sarcoma patient who had an amputation. The insurance didn't want to pay for his prosthetic leg. The Legal Information Network for Cancer got involved with a positive outcome:
http://www.tricities.com/news/local/article_b20c6d68-3afa-11e4-883a-001a4bcf6878.html