Sonography has been used to diagnose lesions of the menisci. Only the peripheral portions of the menisci can be visualized. The normal meniscus is visualized using ultrasound as a compact hyperechoic triangular structure . Irregular hypoechoic clefts within the substance of the meniscus can be identified in the setting of a tear [26,27]. Although two studies have reported reasonable sensitivity and specificity for the sonographic diagnosis of meniscal tears [28,29], the authors use MRI rather than sonography for the assessment of the injured knee, because it provides a more global assessment and has a higher accuracy for diagnosing meniscal tears.
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