Knee Surgery, Sports Traumatology, Arthroscopy

, Volume 19, Issue 12, pp 2050–2051 | Cite as

Double-layered lateral meniscus



A case of double-layered lateral meniscus in which an accessory proximal hemimeniscus was overlying the body and posterior horn of the lateral meniscus is here reported. The accessory hemimeniscus lays marginal and parallel to the normal lateral meniscus with its periphery dissociated from the capsule and was significantly thinner and more mobile than its underlying counterpart. It was resected arthroscopically, and the patient’s symptoms were significantly improved. This case demonstrates an interesting and extremely rare anatomical abnormality of the lateral meniscus.

Level of evidence    IV.


Abnormality Double layered Lateral Meniscus 


  1. 1.
    Clarke HD, Scott WN, Insall JN (2001) Anatomic aberrations. In: Insall JN, Scott WN (eds) Surgery of the knee, 3rd edn. New York’ Churchill-Livingstone, New York, pp 77–94Google Scholar
  2. 2.
    Karataglis D, Dramis A, Learmonth DJ (2006) Double layered lateral meniscus. A rare anatomical aberration. Knee 13:415–416PubMedCrossRefGoogle Scholar
  3. 3.
    Komatsu N, Yamamoto K, Chosa E (2008) Bilateral congenital separation of the lateral meniscus. A case report. Knee 15:330–332PubMedCrossRefGoogle Scholar
  4. 4.
    Okahashi K, Sugimoto K, Iwai M et al (2005) Double layered lateral meniscus. J Orthop Sci 10:661–664PubMedCrossRefGoogle Scholar
  5. 5.
    Suzuki S, Mita F, Ogishima H (1991) Double layered meniscus: a newly found anomaly. Arthroscopy 7:267–271PubMedCrossRefGoogle Scholar
  6. 6.
    Takayama K, Kuroda R, Matsumoto T et al (2009) Bilateral double-layered lateral meniscus: a report of two cases. Knee Surg Sports Traumatol Arthrosc 17:1336–1339PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.ShenyangChina

Personalised recommendations