A quantitative MRI investigation of the association between iliotibial band syndrome and patellofemoral malalignment.

Autor:	Li J; Department of Radiology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China., Sheng B; Department of Radiology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China., Qiu L; Department of Radiology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China., Yu F; Department of Radiology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China., Lv FJ; Department of Radiology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China., Lv FR; Department of Radiology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China., Yang H; Department of Radiology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
Jazyk:	angličtina
Zdroj:	Quantitative imaging in medicine and surgery [Quant Imaging Med Surg] 2021 Jul; Vol. 11 (7), pp. 3209-3218.
DOI:	10.21037/qims-20-1101
Abstrakt:	Background: The iliotibial band (ITB) has a wide patellar insertion that provides lateral restraint to the patella and maintains the patellofemoral joint's stability. There has been limited investigation into the relationship between patellofemoral malalignment and iliotibial band syndrome (ITBS). Methods: We retrospectively analyzed 47 knees with ITBS by retrieving magnetic resonance imaging (MRI) data collected over an approximately 6-year period from our database. The Insall-Salvati ratio, lateral patellofemoral angle (LPA), lateral patellar tilt (LPT), lateral trochlear length (LTL), angle of the non-weight-bearing facet of the lateral femoral condyle (nwb-LFCA), and the ITB-lateral femoral condyle (IT-LFC) distance were measured on MR images. The knees of 47 age- and gender-matched subjects were enrolled as the normal group. Results: In the ITBS group, over one third (34%, 16/47) of knees had abnormal patellofemoral measurements, including 8 (17%, 8/47) knees with patellar alta, 11 (23.4%, 11/47) knees with an abnormally decreased LPA, and 5 (10.6%, 5/47) knees with an abnormally increased LPT indicating lateral patellar tilt. Moreover, 8 knees had simultaneous combinations of two or three abnormality parameters, and 8 (17%, 8/47) knees presented with superolateral Hoffa's fat pad edema. The Insall-Salvati ratio, LPT, and nwb-LFCA in the ITBS group were significantly higher than those in the normal group (P=0.001, P<0.001, and P<0.001, respectively); the LPA and IT-LFC distances in the ITBS group were significantly lower (P=0.003, P<0.001, respectively) than those in the normal group. There were mild to moderate correlations between the MRI parameters and ITBS (P=0.006, P<0.001, respectively). Conclusions: This study confirmed that a higher position or lateral tilt of the patella and a steeper morphology of the anterior part of the lateral femoral condyle were associated with the development of ITBS, which is helpful in understanding and further exploring the mechanism of ITBS. Competing Interests: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at http://dx.doi.org/10.21037/qims-20-1101). The authors have no conflicts of interest to declare. (2021 Quantitative Imaging in Medicine and Surgery. All rights reserved.)
Databáze:	MEDLINE
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