Summary

Sonography of the lower extremities has an important role in the evaluation of sports-related injuries. Some advantages of sonography over MRI include

Image 2nd Plantar Plate
Fig. 33. Intermetatarsal bursitis. Anechoic compressible fluid collection (arrow) located within the second interspace measuring 1.5 cm x 0.5 cm.
Plantar Plate Tear

Fig. 34. Plantar plate injury. Longitudinal sonographic image of the second metatarsophalan-geal joint demonstrates an irregular hypoechoic plantar plate (arrow) in this patient with a partial tear of the plantar plate. Sonography provides high resolution imaging of this small structure with the addition of dynamic imaging to provide the proper diagnosis.

Fig. 34. Plantar plate injury. Longitudinal sonographic image of the second metatarsophalan-geal joint demonstrates an irregular hypoechoic plantar plate (arrow) in this patient with a partial tear of the plantar plate. Sonography provides high resolution imaging of this small structure with the addition of dynamic imaging to provide the proper diagnosis.

accessibility, high resolution, and lower cost. More importantly, dynamic imaging under sonographic visualization allows diagnoses that cannot be made with routine MRI. Direct imaging correlation with patient symptoms provides important information to the treating physician. The disadvantages of sonography include operator dependence and long learning curve.

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