What is a bakers cyst in the popliteal fossa?

A Baker's cyst, also known as a popliteal cyst, is a fluid-filled sac that forms in the popliteal fossa, the area behind the knee. It typically occurs due to the accumulation of synovial fluid, often as a result of knee joint conditions such as Arthritis or a meniscal tear. While many people may not experience symptoms, it can cause swelling and discomfort in the knee area. In some cases, the cyst may rupture, leading to pain and swelling in the calf.