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Predictive factors for osteochondritis dissecans of the lateral femoral condyle concurrent with a discoid lateral meniscus

  • Junsei Takigami
  • Yusuke Hashimoto
  • Tomohiro Tomihara
  • Shinya Yamasaki
  • Koji Tamai
  • Kyoko Kondo
  • Hiroaki Nakamura
Knee
  • 332 Downloads

Abstract

Purpose

Osteochondritis dissecans (OCD) of the lateral femoral condyle is relatively rare, and it is often reported in combination with discoid lateral meniscus. However, little is known about the mechanism underlying this connection. Predictive factors for OCD coinciding with discoid lateral meniscus in Japanese children and adolescents were assessed.

Methods

During 2000–2015, 152 knees in 133 patients aged 5–15 years were diagnosed with symptomatic complete discoid lateral meniscus. Patients were evaluated using radiography and magnetic resonance imaging (MRI). OCD was radiographically graded using the Brückl classification. Based on Ahn’s MRI classifications, discoid lateral meniscus was divided into four types of meniscal shift: no shift (N), anterocentral (AC), posterocentral (PC), or central (C). Relationships between OCD and patient sex, age and Ahn’s shift type were analysed.

Results

OCD of the lateral femoral condyle was associated with discoid lateral meniscus in 22 (14.5%) of 152 knees. OCD was classified as Brückl’s stage 1 in 5 knees, stage 2 in 12, stage 3 in 3, stage 4 in 1, and stage 5 in 1. OCD was found in 12 of 96 knees (12.5%) with type N meniscal shift, 4 of 24 knees (16.7%) with type AC, 0 of 21 knees (0%) with type PC, and 6 of 11 knees (54.5%) with type C. Multivariate logistic regression analysis showed that males had a significantly increased odds ratio (OR) [14.8; 95% confidence interval (CI) 2.6–83.4]. Those aged 5–11 years had a significantly higher OR (12.5; 95% CI 2.8–55.9) than those aged 12–15 years. The OR for type C coinciding with OCD was significantly elevated (13.4; 95% CI 2.3–78.7).

Conclusions

Concurrent OCD was found in 22 (14.5%) of 152 knees with discoid lateral meniscus. Male sex, young age (5–11 years), and having a type C meniscal shift of the discoid lateral meniscus as shown by MRI were found to be predictive factors for OCD of the LFC.

Level of evidence

III.

Keywords

Osteochondritis dissecans (OCD) Discoid lateral meniscus Brückl classification Ahn classification Radiography Magnetic resonance imaging (MRI) 

Notes

Compliance with ethical standards

Funding sources

This study was funded by a grant from the Japanese Foundation for Research and Promotion of Endoscopy.

Conflict of interest

The authors declare no conflict of interest associated with this manuscript.

Ethical approval

This study was approved by the internal review board of Osaka City University School of Medicine (approval number 2727).

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2017

Authors and Affiliations

  • Junsei Takigami
    • 1
  • Yusuke Hashimoto
    • 2
  • Tomohiro Tomihara
    • 1
  • Shinya Yamasaki
    • 4
  • Koji Tamai
    • 2
  • Kyoko Kondo
    • 3
  • Hiroaki Nakamura
    • 2
  1. 1.Department of Orthopaedic SurgeryShimada HospitalHabikinoJapan
  2. 2.Department of Orthopaedic SurgeryOsaka City University Graduate School of MedicineOsakaJapan
  3. 3.Department of Public HealthOsaka City University Faculty of MedicineOsakaJapan
  4. 4.Department of Orthopaedic SurgeryOsaka City General HospitalOsakaJapan

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