Pathology:Inner fragment of torn meniscus is flipped
over ipsilateral anterior horn, and lies superior or posterior
to the normal anterior horn.Occurs more
frequently with medial, rather than lateral, meniscal tears.
anterior meniscus (8+ mm), measured in vertical dimension, with a
diminutive posterior horn (sagittal view).Alternatively, anterior lying fragment
results in elongated anterior horn with a band of high signal intensity differentiating
the anterior horn from the immediately adjacent (anterior or posterior)
flipped meniscal fragment.
Note: The flipped
meniscus is frequently associated with concurrent fragment-in-notch