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MR Imaging of Meniscal Contusion in the Knee

R. Lee Cothran, Jr.1, Nancy M. Major1, Clyde A. Helms1 and Laurence D. Higgins2

1 Department of Radiology, Duke University Medical Center, P. O. Box 3808, Durham, NC 27710.
2 Division of Orthopaedic Surgery, Duke University Medical Center, P. O. Box 3371, Durham, NC 27710.



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  		Fig. 1A. —30-year-old man with injury 2 weeks before imaging. Sagittal spin-echo proton density—weighted MR image (TR/TE, 2000/20) with fat suppression reveals amorphous signal in posterior horn of medial meniscus (arrow), with subjacent high signal in tibial plateau.

 


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  		Fig. 2A. —23-year-old man with reported knee dislocation. Spin-echo proton density—weighted MR image (TR/TE, 2000/20) with fat suppression reveals meniscal contusion (black arrow) and subtle adjacent bone contusion (white arrow).

 


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  		Fig. 3A. —39-year-old woman who injured her knee skiing several days before imaging. Patient had tibial plateau fracture and avulsed anterior cruciate ligament. Sagittal spin-echo proton density—weighted MR image (TR/TE, 2000/20) with fat suppression reveals abnormal signal in posterior horn of medial meniscus with adjacent bone contusion.

 


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  		Fig. 3B. —39-year-old woman who injured her knee skiing several days before imaging. Patient had tibial plateau fracture and avulsed anterior cruciate ligament. Arthroscopic photograph of meniscus reveals abnormal injection and vascularity at periphery of injured meniscus (arrows). No meniscal tear or meniscocapsular separation was identified on arthroscopy (F = femur; m = body of meniscus).

 


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  		Fig. 1B. —30-year-old man with injury 2 weeks before imaging. Follow-up MR image (2000/20) after 67 weeks reveals interval resolution of meniscal signal with considerable decrease in underlying bone signal.

 


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  		Fig. 2B. —23-year-old man with reported knee dislocation. Follow-up MR image (1800/20) obtained 20 weeks after initial imaging reveals resolution of abnormal meniscal signal.

 

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