Korean J Pain.  2021 Apr;34(2):229-233. 10.3344/kjp.2021.34.2.229.

The role of the iliotibial band cross-sectional area as a morphological parameter of the iliotibial band friction syndrome: a retrospective pilot study

Affiliations
  • 1Department of Anesthesiology and Pain Medicine, International St. Mary’s Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea
  • 2Department of Anesthesiology and Pain Medicine, Myongji Hospital, Hanyang University College of Medicine, Goyang, Korea
  • 3Department of Anesthesiology and Pain Medicine, National Police Hospital, Seoul, Korea

Abstract

Background
Iliotibial band friction syndrome (ITBFS) is a common disorder of the lateral knee. Previous research has reported that the iliotibial band (ITB) thickness (ITBT) is correlated with ITBFS, and ITBT has been considered to be a key morphologic parameter of ITBFS. However, the thickness is different from inflammatory hypertrophy. Thus, we made the ITB cross-sectional area (ITBCSA) a new morphological parameter to assess ITBFS.
Methods
Forty-three patients with ITBFS group and from 43 normal group who underwent T1W magnetic resonance imaging were enrolled. The ITBCSA was measured as the cross-sectional area of the ITB that was most hypertrophied in the magnetic resonance axial images. The ITBT was measured as the thickest site of ITB.
Results
The mean ITBCSA was 25.24 ± 6.59 mm 2 in the normal group and 38.75 ± 9.11 mm 2 in the ITBFS group. The mean ITBT was 1.94 ± 0.41 mm in the normal group and 2.62 ± 0.46 mm in the ITBFS group. Patients in ITBFS group had significantly higher ITBCSA (P < 0.001) and ITBT (P < 0.001) than the normal group. A receiver operator characteristic curve analysis demonstrated that the best cut-off value of the ITBT was 2.29 mm, with 76.7% sensitivity, 79.1% specificity, and area under the curve (AUC) 0.88. The optimal cut-off score of the ITBCSA was 30.66 mm 2 , with 79.1% sensitivity, 79.1% specificity, and AUC 0.87.
Conclusions
ITBCSA is a new and sensitive morphological parameter for diagnosing ITBFS, and may even be more accurate than ITBT.

Keyword

Anatomy; Cross-Sectional; Cumulative Trauma Disorders; Diagnosis; Fascia Lata; Friction; Hypertrophy; Iliotibial Band Syndrome; Knee Injuries; Magnetic Resonance Imaging; ROC Curve; Sensitivity and Specificity
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