You can inpurt bakers cyst into the search engine at top right of this post in order to gain access as well. We know this. More There than what you read. You have to actually click on all the blue hyperlinks and read, scroll waaaaay down through all the posts to see it all. Also the 1998 archives are there above the others, you just click on the month name there and it will open them.
ALL joints have synovial sacs for the lubrication of that joint.
This is one of the more important reasons I say that Baker's is related to the same causes that form an arthritic tendency. When any muscle contracts, the opposing muscle for that joint is supposed to relax completely by reflex action. Surely, by now, the reader can begin to understand why this causes Baker's Cysts. The symptoms of a Baker's is directly related to where the hernia happens. Of course, that is also where all the major nerves, blood vessels, ligaments and tendons are as well and for the same reason.