Here is a site with some information on it:
[url="http://www.sportsinjuryclinic.net/cybertherapist/back/backknee/bakerscyst.htm"]http://www.sportsinjuryclinic.net/cybertherapist/back/backknee/bakerscyst.htm[/url]
ugh no insurance is indeed a scarey thought (been there) You might want to apply for medicaid (or whatever your area's public health assistance is) if not for this then for other health things as they come up. Good luck hope you get fixed soon