Tibial plateau fracture with lipohemarthrosis
Right knee pain after football game: jumped and landed on to knee. On examination, pain over the medial side of his knee with pain when bearing weight. No significant past medical history.
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Tibial plateau fracture with lipohemarthrosis.
In addition to the cortical irregularity in the medial tibial plateau (the fracture), there is a large joint effusion, best seen on the lateral view. The joint effusion contains a straight line, representing a fluid-fat level, with the lighter fat from the bone marrow ("lipo") floating above the heavier blood ("heme"). The straight line also reveals that the patient's leg is actually lying on a table and the film was rotated to present the knee in an upright position (the blood is layering dependently).