What is an Ultrasound-Guided Aspiration of a Baker’s Cyst?

This procedure uses image-guided technology to remove a collection of fluid from behind the knee. A Baker’s Cyst, also known as a popliteal cyst, is a benign swelling behind the knee often caused by arthritis or a cartilage tear. If the cyst becomes painful and treatment is required, doctors can use ultrasound imaging to locate the cyst behind the knee. Then, using a very small needle, a physician is able to remove the fluid.