Iliopsoas tendon impingement syndrome
Iliopsoas tendon impingement syndrome has been reported to account for up to 4% of painful hip arthroplasties.
In the typical form of this condition, anterior overhang due to excessive acetabular cup retroversion causes impingement against the deep aspect of the iliopsoas tendon.
17 subjects with iliopsoas impingement syndrome and 48 controls were investigated using musculoskeletal ultrasound.
Visibility of the acetabular cup, contact with the psoas tendon and indirect signs of iliopsoas impingement syndrome were examined - when the cup was visible, its relation (size, position) to the psoas tendon was recorded.
The current study confirmed that the anterior aspect of the hip is accessible to US imaging in all patients with a total hip replacement. Signs of iliopsoas tendon impingement syndrome could be established with a specificity of 100%.
Therefore, when contact is visible between the acetabular cup and iliopsoas tendon, diagnosis of iliopsoas impingement syndrome can be suggested.
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> From: Guillin et al., J Ultrasound Med (2017) (Epub ahead of print). All rights reserved to the American Institute of Ultrasound in Medicine. Click here for the online summary.