PMC8556129_01
Plain radiography reveals no abnormal findings.
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Plain radiography revealed no apparent abnormal findings (Figure 1).
Magnetic resonance imaging (proton density-weighted image) shows high signal in the posterior segment and an increase in its volume.
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Magnetic resonance imaging (MRI) (proton density-weighted image) showed high signal in the posterior segment of the lateral meniscus and an increase in its volume (Figure 2).
(a) Arthroscopic findings show an accessory meniscus with a flat surface overlying a normal lateral meniscus. (b) and (c) The accessory meniscus is firmly connected to the posterior horn and middle segment of the normal meniscus. (d). The accessory meniscus demonstrated favorable mobility by probing.
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Furthermore, it showed favorable mobility on probing (Figures 3(a)-3(d)).
(a) and (b) Arthroscopic findings after resection of the accessory meniscus show that thickness and shape of the resected meniscus are similar to those of the normal meniscus.
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The remaining meniscus was stable, and its thickness and shape were similar to those of the normal meniscus (Figures 4 (a) and 4 (b)).