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The plica syndrome: diagnostic value of MRI with arthroscopic correlation.

Jee WH, Choe BY, Kim JM, Song HH, Choi KH. J Comput Assist Tomogr 1998 Sep-Oct;22(5):814-8.

PURPOSE.
Our goal was to evaluate the diagnostic value of MRI in plica syndrome.

METHOD.
MR images of a patient group (n = 55) with arthroscopically confirmed pathologic mediopatellar plicae were retrospectively analyzed and compared with those of a control group (n = 100). We obtained axial multiplanar gradient-recalled (MPGR), axial T1-weighted, and sagittal T2-weighted MR images. MR images were assessed for the width and length of all medial plicae.

RESULTS.
In the diagnosis of plica syndrome, sensitivity and specificity were 73 and 78% on axial MPGR images, 71 and 83% on sagittal T2-weighted images, and 95 and 72% on combination of both images, respectively. The incidence of pathologic medial plica increased with a criterion of extension beyond the medial end of the patella on axial MPGR images.

CONCLUSION.
MRI is a useful screening method in the diagnosis of plica syndrome.

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