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MR Imaging of Meniscal Cysts

Incidence, Location, and Clinical Significance

Scot E. Campbell1, Timothy G. Sanders1,2 and William B. Morrison1,3

1 Department of Radiology, Wilford Hall USAF Medical Center, 759th MDTS/MTRD, 2200 Bergquist Dr., Ste. 1, Lackland AFB, TX 78236-5300.
2 Department of Radiology, The University of Texas, Health Science Center, 7703 Floyd Curl Dr., San Antonio, TX 78284-7800.
3 Present address: Department of Radiology, Thomas Jefferson University Hospital, 111 S. 11th St., Philadelphia, PA 19107.



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  		Fig. 1A. —31-year-old man with right medial knee pain and no palpable mass on physical examination. Coronal T2-weighted fast spin-echo MR image with frequency-selective fat saturation (TR/TE, 4000/80) shows horizontal cleavage tear (open arrow) of medial meniscus. Abnormal meniscal signal directly contacts adjacent meniscal cyst (solid arrow).

 


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  		Fig. 1B. —31-year-old man with right medial knee pain and no palpable mass on physical examination. Sagittal T1-weighted MR image (400/16) shows horizontal cleavage tear (arrow) involving posterior horn of medial meniscus.

 


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  		Fig. 1C. —31-year-old man with right medial knee pain and no palpable mass on physical examination. Sagittal T2-weighted fast spin-echo MR image at same level as B with frequency-selective fat saturation (4000/80) shows small adjacent meniscal cyst (arrow).

 


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  		Fig. 2. —20-year-old man with right medial knee pain and recent onset of palpable mass after kickboxing injury. Coronal T2-weighted fast spin-echo MR image with frequency-selective fat saturation (TR/TE, 4000/80) shows complex tear (straight arrow) of medial meniscus with horizontal component extending to and directly contacting large meniscal cyst (curved arrow).

 


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  		Fig. 3. —27-year-old man with lateral knee pain and no palpable mass. Sagittal T2-weighted fast spin-echo MR image with frequency-selective fat saturation (TR/TE, 4000/80) shows horizontal tear (long arrow) of anterior horn of lateral meniscus extending to and contacting adjacent meniscal cyst (short arrow).

 

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