Patellar tendinopathy with intratendinous alteration on MRI may be related to patellofemoral dysplasia

Patellar tendinopathy with intratendinous alteration on MRI may be related to patellofemoral... Patellar tendinopathy (PT) is a frequent overuse injury of the extensor knee apparatus, whereas as up to 30% of the athletes might suffer from persisting symptoms during their entire career. In the present case‐control study, 47 patients (30.8 ± 11.4 years) with PT with intratendinous alteration (PTita) of a minimum of ≥25% of the axial surface on MRI and minimum Blazina score of II (pain during without limiting sports activity) were included; MR images were analyzed for trochlear geometry, patellar height/tilt, and tibial tubercle‐trochlear groove distance (TT‐TG). The control group (CG) comprised 87 age‐ and gender‐matched patients without history of anterior knee pain or lateral patellar instability. It was hypothesized that patients with PT might be related to patellofemoral dysplasia. It was found that the patella was significantly higher in patients with PT compared to the CG (patellotrochlear index [PT‐I]: 0.33 vs 0.37, P = .014; Insall‐Salvati index [InSa]: 1.18 vs 1.07, P = .004). PT‐I was above the cut‐off value in 10.6% of PT knees (CG 5.7%, P = .27), and InSa in 42.6% (CG 21.8%, P = .012). TT‐TG was significantly higher in patients with PT compared to CG (12.0 mm vs 9.9 mm, P = .002); however, TT‐TG was only pathologic (>20 mm) in one patient. The trochlear facet ratio was above the cut‐off value in 55.3% of PT patients and 23% of CG (P < .001), and was significantly greater in patients with PT (0.39 ± 0.09) than CG (0.48 ± 0.1, P < .001). Knees with PT have significantly more morphological characteristics of patellofemoral instability, which needs to be considered especially in recurrent or treatment‐refractive cases. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Scandinavian Journal of Medicine & Science in Sports Wiley

Patellar tendinopathy with intratendinous alteration on MRI may be related to patellofemoral dysplasia

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Publisher
Wiley Subscription Services, Inc., A Wiley Company
Copyright
Copyright © 2018 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd
ISSN
0905-7188
eISSN
1600-0838
D.O.I.
10.1111/sms.13033
Publisher site
See Article on Publisher Site

Abstract

Patellar tendinopathy (PT) is a frequent overuse injury of the extensor knee apparatus, whereas as up to 30% of the athletes might suffer from persisting symptoms during their entire career. In the present case‐control study, 47 patients (30.8 ± 11.4 years) with PT with intratendinous alteration (PTita) of a minimum of ≥25% of the axial surface on MRI and minimum Blazina score of II (pain during without limiting sports activity) were included; MR images were analyzed for trochlear geometry, patellar height/tilt, and tibial tubercle‐trochlear groove distance (TT‐TG). The control group (CG) comprised 87 age‐ and gender‐matched patients without history of anterior knee pain or lateral patellar instability. It was hypothesized that patients with PT might be related to patellofemoral dysplasia. It was found that the patella was significantly higher in patients with PT compared to the CG (patellotrochlear index [PT‐I]: 0.33 vs 0.37, P = .014; Insall‐Salvati index [InSa]: 1.18 vs 1.07, P = .004). PT‐I was above the cut‐off value in 10.6% of PT knees (CG 5.7%, P = .27), and InSa in 42.6% (CG 21.8%, P = .012). TT‐TG was significantly higher in patients with PT compared to CG (12.0 mm vs 9.9 mm, P = .002); however, TT‐TG was only pathologic (>20 mm) in one patient. The trochlear facet ratio was above the cut‐off value in 55.3% of PT patients and 23% of CG (P < .001), and was significantly greater in patients with PT (0.39 ± 0.09) than CG (0.48 ± 0.1, P < .001). Knees with PT have significantly more morphological characteristics of patellofemoral instability, which needs to be considered especially in recurrent or treatment‐refractive cases.

Journal

Scandinavian Journal of Medicine & Science in SportsWiley

Published: Jan 1, 2018

Keywords: ; ; ; ; ; ;

References

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