J Korean Orthop Assoc.  2015 Apr;50(2):143-147. 10.4055/jkoa.2015.50.2.143.

Bilaterally Simultaneous Medial and Lateral Discoid Menisci

• Nam SO
• Kim JH
• Byun YS
• Han IH

• KMID: 2106750
• DOI: http://doi.org/10.4055/jkoa.2015.50.2.143

Abstract

Most discoid menisci are lateral and medial discoid meniscus is very rare. Several articles have reported on bilateral lateral discoid menisci as well as bilateral medial discoid menisci, and a few articles have reported simultaneous medial and lateral discoid menisci in the same knee. Only one case of simultaneous medial and lateral discoid menisci, bilaterally, has been reported. We present another case of a male patient with bilaterally simultaneous medial and lateral discoid menisci, diagnosed with magnetic resonance imaging and arthroscopy. The patient was treated by arthroscopic partial meniscetomy.

Keyword

meniscus; bilateral discoid meniscus; meniscectomy; magnetic resonance image

MeSH Terms

Arthroscopy
Humans
Knee
Magnetic Resonance Imaging
Male

Figure

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  Figure 1 Magnetic resonance imaging of the right knee. (A) Coronal image of the right knee shows the medial discoid meniscus with mucoid degeneration and the lateral discoid meniscus with no tear. In sagittal image, the complete medial discoid meniscus has horizontal tear (B) and the incomplete lateral discoid meniscus is intact (C).

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  Figure 2 Arthroscopic views of the right knee. The complete medial discoid meniscus (A) and the incomplete lateral discoid meniscus (B) are shown.

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  Figure 3 Magnetic resonance imaging of the left knee. (A) Coronal image of the left knee shows the medial discoid meniscus with horizontal tear and intact lateral discoid meniscus. Sagittal image shows the complete type medial discoid meniscus with intra-meniscal signal change, which is considered meniscal tear (B) and shows the complete type intact lateral discoid meniscus (C).

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  Figure 4 Arthroscopic views of the left knee. The complete medial discoid meniscus (A) and the complete lateral discoid meniscus (B) are shown.

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