Medical Q&As

Baker's Cyst

I have been told that I may have a Bakers Cyst (behind the knee). What causes it and can it be treated?

A Bakerís Cyst is a fluid filled sac bulging out at the back of the knee. In long-standing cases the sac may extend down the calf and can restrict flexion of the knee joint. It results from a persistent increase in the synovial fluid, which is the lubricating fluid contained within the knee joint. Treatment is aimed at dealing with the cause of the increase in synovial fluid. If the cyst is very large it may need to be surgically removed.