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A new surgical drainage procedure for Baker's cysts.

An 85-year-old lady presented to the geriatric service in October 1987 with a sudden onset of severe incapacitating pain in her right knee and calf. She had a long history of osteoarthritis in both knees, but her right knee had been rapidly worsening prior to her presentation. An arthrogram confirmed a large popliteal cyst, which possibly may have ruptured, and underlying osteoarthritis (Fig. 1). She was treated conservatively by aspiration and Depo-Medrone8 injection, and was later discharged home. Over the next 5 months she had recurrent painful swellings of the knee and was treated again with aspiration and Depo-Medrone injection, followed by an yttrium injection. Despite this, her painful swelling recurred and she was then referred to the orthopaedic service. In view of her age and other medical conditions, and that she had fair preservation of articular cartilage, she was not considered a suitable candidate for joint replacement. However, she still required treatment of the symptomatic cyst; therefore, in March 1988, she underwent operation.