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Abstract
We report seven cases of spontaneous vacuum phenomenon of the lateral compartment
of the knee. Previous reports of the vacuum phenomenon suggest that it is related
to traction on a joint or the absence of an effusion. The presence of this finding
on plain radiographs, or artifacts associated with it on magnetic resonance imaging,
have been said to create a false-positive indication for meniscal tears, especially
in the medial compartment. We describe plain radiographic, magnetic resonance, and
arthroscopic findings in seven consecutive patients with vacuum phenomenon of the
lateral compartment of the knee and conclude that this finding may be a true-positive
indication for degenerative meniscal tears and chondrosis. The etiology of this finding
and its long-term significance remains unclear.
Arthroscopy 1998 Sep;14(6):576-9
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Copyright
© 1998 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.
