PMC4901016_01
65-year-old man with fracture of the fabella. Lateral and oblique radiographs of the right knee. A. Lateral view shows an effusion (black arrow) and the tibial plateau fracture (white arrows). The fracture line through the fabella (arrowhead) is not visible on this view. B. Oblique view shows a vertical, mildly displaced fracture of the fabella (black arrow). The split-depression fracture of the lateral plateau is better visualized (white arrows).
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Initial radiographs of the right knee (Fig. 1) showed a vertically oriented, slightly displaced fracture of the fabella.
65-year-old man with fracture of the fabella. CT of the right knee in bone windows. A. Axial image at the level of the femoral condyles shows a sagittally oriented fracture of the fabella (arrow). B. Coronally reformatted image at the level of the fabella also demonstrates a sagittally oriented fracture of the fabella (arrow). C. Coronally reformatted image at the level of the intercondylar notch shows a split-depression fracture of the lateral tibial plateau with lateral displacement of the lateral fragment (arrows).
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Subsequent CT images (Fig. 2A, B, C, Fig. 3A, B) confirmed a sagittally oriented, slightly displaced fabellar fracture and a Schatzker type-II tibial-plateau fracture.