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| IMAGE QUIZ ARCHIVE | ||||||
Image Quiz Pain in the Popliteal Region of the Knee | ||||||||
 For larger view place cursor on image  For larger view place cursor on image  For larger view place cursor on image | A sixty-seven-year-old woman was seen because of pain in the right knee that had been present for two years. The patient described the pain as being posterior, prone to aggravation with certain activities, and diminished with rest. She did not have pain while in bed at night, but the posterior aspect of the knee was tender when touched. On physical examination, the patient had a full range of motion of the knees. There was moderate tenderness in the posterolateral aspect of the right knee. There was no palpable mass in the popliteal space, but there was a central area
of tenderness. There was no effusion of the joint or tenderness at the joint line. A magnetic resonance imaging scan of the right knee was interpreted by a radiologist as demonstrating a 2.5-centimeter-diameter Baker cyst. This cyst was aspirated, and five milliliters of gelatinous fluid was obtained. | |||||||
What is the diagnosis? | ||||||||
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