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Case Reports
. 2009 Feb;5(1):9-11.
doi: 10.1007/s11420-008-9095-2. Epub 2008 Nov 18.

Displacement of the posterior horn of the lateral meniscus into posterolateral compartment: an unusual injury pattern

Robert G Marx  1 , Jessica H Ryu
Affiliations
Case Reports

Displacement of the posterior horn of the lateral meniscus into posterolateral compartment: an unusual injury pattern

Robert G Marx et al. HSS J. 2009 Feb.

Abstract

We report a case of acute ACL injury with an unusual lateral meniscal tear pattern. The entire posterior horn of the lateral meniscus was avulsed from its attachments while remaining in continuity with the body of the meniscus. It was displaced posteriorly and laterally to the popliteus tendon so that it was not immediately visible at the time of arthroscopy. This type of displacement of the posterior horn of the lateral meniscus is difficult to identify at arthroscopy and has not previously been described in the literature to our knowledge. We recommend to surgeons who encounter an absent posterior horn of the lateral meniscus to consider this injury pattern.

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Figures

Fig. 1
Fig. 1
a Coronal MRI of the left knee. b Coronal MRI of the left knee, posterior to the prior image (a)
Fig. 2
Fig. 2
Arthroscopic view of the lateral compartment
Fig. 3
Fig. 3
Arthroscopic view of the lateral compartment after reduction of the posterior horn
See this image and copyright information in PMC

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