Formation of ring-shaped lateral meniscus following anterior cruciate ligament reconstruction: A case report

Masataka Fujii, Takayuki Furumatsu, Shinichi Miyazawa, Takaaki Tanaka, Hiroto Inoue, Yuya Kodama, Toshifumi Ozaki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Introduction We presented the first case in the literature of inter-horn bridge formation involved in ring-shaped lateral meniscus after anterior cruciate ligament (ACL) reconstruction. Presentation of case A 22-year-old man underwent anatomic double-bundle ACL reconstruction using semitendinosus tendon autograft. At the surgery, the lateral meniscus showed a normal appearance without meniscal tears and had no instability. There were no meniscal anomalies such as discoid meniscus and ring-shaped meniscus. Magnetic resonance image examination was performed before second-look arthroscopy at 1 year postoperatively. A coronal plane showed a small triangular fragment located at the medial border of the lateral tibial plateau. An axial plane demonstrated a ring-shaped lateral meniscus. On second-look arthroscopy, there was a meniscus-like tissue formation that connected the anterior horn to the posterior horn of the lateral meniscus at the lateral intercondylar tubercle. Discussion Ring-shaped meniscus is an extremely rare malformation of the meniscus. Our hypothesis was that drilling debris and remaining remnant of ACL might induce a scar tissue formation. Conclusion This is the first case in the literature of inter-horn bridge formation involved in ring-shaped lateral meniscus following ACL reconstruction.

Original languageEnglish
Pages (from-to)229-232
Number of pages4
JournalInternational Journal of Surgery Case Reports
Volume31
DOIs
Publication statusPublished - 2017

Keywords

  • Anterior cruciate ligament reconstruction
  • Knee
  • Meniscus
  • Ring-shaped lateral meniscus
  • Second-look arthroscopy

ASJC Scopus subject areas

  • Surgery

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