Knee cysts, including popliteal cysts, meniscal cysts, or cruciate ligament cysts, are not particularly major procedures when analyzed purely in terms of surgical operation. However, the impact on knee function can vary somewhat between cysts in different areas. In popliteal cysts, the function of the knee joint is not greatly affected after the surgical removal of the cyst, but in meniscal cysts, even if the cyst is removed. Because there is no way to regenerate the meniscus, there is a risk of premature traumatic arthritis at a later stage, caused by the lesion itself and not by the surgical operation. In addition, most of the cruciate ligament cysts are considered for ligament reconstruction surgery, which requires systematic functional rehabilitation exercises at a later stage to gradually restore the range of motion of the knee joint. It is only if the recovery is good that it will not have much effect. All of the above are from the different characteristics of the disease itself and have less to do with the size of the surgery.