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MDCT of Tendon Abnormalities Using Volume-Rendered Images

K. Ohashi1, G. Y. El-Khoury and D. L. Bennett

1 All authors: Department of Radiology, University of Iowa Hospitals and Clinics, 200 Hawkins Dr., Iowa City, IA 52242.



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  		Fig. 1A. —18-year-old woman with bilateral anterior dislocation of peroneus brevis tendons and bilateral calcaneal fractures. Axial CT image of left ankle shows anterolateral dislocation of peroneus brevis tendon (short arrow) and small avulsed bone fragment from lateral malleolus (long arrow).

 


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  		Fig. 1B. —18-year-old woman with bilateral anterior dislocation of peroneus brevis tendons and bilateral calcaneal fractures. Volume-rendered 3D CT image viewed from lateral aspect of left ankle shows anteriorly dislocated peroneus brevis tendon (short arrow). Avulsed bone fragment (long arrow) from fibula is also visualized. Similar findings were seen on right (not shown). Dislocated peroneal tendons were surgically reduced bilaterally.

 


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  		Fig. 2. —46-year-old man with partial tear of Achilles tendon. Volume-rendered image from helical CT data shows eccentric defect (arrow) of Achilles tendon that is consistent with partial tear. Achilles tendon thickening may reflect underlying tendinopathy.

 


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  		Fig. 3A. —21-year-old man with avulsion of Achilles tendon from calcaneal tuberosity and partial tear of Achilles tendon. Sagittally reconstructed CT image shows avulsed bone fragment (white arrow) from calcaneus (black arrow). Achilles tendon (arrowheads) is retracted superiorly.

 


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  		Fig. 3B. —21-year-old man with avulsion of Achilles tendon from calcaneal tuberosity and partial tear of Achilles tendon. Volume-rendered CT image viewed from posterior aspect of ankle shows eccentric defect (long arrow) in substance of Achilles tendon, which is seen inserting onto avulsed bone fragment (short arrow). These findings were surgically confirmed.

 


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  		Fig. 4A. —45-year-old man with tendinopathy of peroneus longus tendon. Volume-rendered CT image of lateral aspect of ankle shows markedly hypertrophied peroneal tubercle (long arrow). Note thickening of peroneus longus tendon (short arrow) distal and inferior to peroneal tubercle.

 


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  		Fig. 4B. —45-year-old man with tendinopathy of peroneus longus tendon. Axial CT image through calcaneus shows hypertrophied peroneal tubercle (arrow).

 


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  		Fig. 4C. —45-year-old man with tendinopathy of peroneus longus tendon. Sagittal T1-weighted image (TR/TE, 440/21) shows thickening of peroneus longus tendon (short arrow) with increased signal at peroneal tubercle (long arrow). MRI findings confirm presence of tendinopathy.

 


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  		Fig. 5A. —46-year-old man with incidental finding of anomalous tibial insertion of biceps femoris tendon. Volume-rendered 3D CT image viewed from lateral aspect of knee shows biceps tendon (short arrows) inserting onto lateral aspect of proximal tibia. Lateral collateral ligament (long arrow) is partially visualized and is seen to insert on head of fibula.

 


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  		Fig. 5B. —46-year-old man with incidental finding of anomalous tibial insertion of biceps femoris tendon. Sagittally reconstructed CT image through fibular head shows tibial insertion of biceps tendon (arrows). Lateral collateral ligament is also seen (arrowheads) between lateral femoral condyle and fibular head.

 

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