Baker’s Cyst

Sometimes mistaken for a blood clot, a baker’s cyst, also referred to as a popliteal or synovial cyst, is a soft, fluid-filled sack that forms on the back of the knee. Baker’s cysts are usually caused by aggravating issues like arthritis or a cartilage tear, which cause the knee to produce excess fluid. This can then result in pain and swelling behind the knee, stiffness, difficulty flexing or an inability to flex the knee, and even greater pain when the knee is fully extended or flexed, especially when physically active. 

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Baker’s cyst usually will go away without the need for medical intervention. However, larger cysts typically require additional treatment, which may include 1) R.I.C.E., or Rest, Ice, Compression and Elevation of the leg and knee, 2) avoiding activities that strain the knee and aggravate the cyst, 3) physical therapy, and even fluid drainage. If the pain persists, surgery may be recommended with only a small incision needed on the back of the knee to correct this issue. However, it is important to note that the underlying conditions that caused this must also be treated to prevent the Baker’s cyst from returning.