naa a22 4500 510760341 CHVBK 20180411083137.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11420-013-9361-9 doi (NATIONALLICENCE)springer-10.1007/s11420-013-9361-9 MR Appearance and Clinical Significance of Changes in the Hip Muscles and Iliopsoas Tendon After Arthroscopic Iliopsoas Tenotomy in Symptomatic Patients [Elektronische Daten] [Kendra Hain, Donna Blankenbaker, Arthur De Smet, James Keene, Alejandro del Rio] Background: Iliopsoas tenotomy is a treatment for snapping hip. Does this surgical procedure change the surrounding muscle and tendon anatomy? Questions/Purposes: This study seeks to evaluate the changes in the MR appearance of the hip muscles and iliopsoas tendon in patients following arthroscopic iliopsoas tenotomy. Methods: One hundred sixty-nine consecutive adults were evaluated after iliopsoas tenotomy at the lesser trochanter. Each MR exam was evaluated independently by three radiologists for muscle edema, atrophy (grade 0-4), compensatory hypertrophy, signal within the iliopsoas tendon (increased on T1 or T2 sequences), and iliopsoas tendon morphology (distorted or disrupted) above, at, and below the iliopectineal eminence. A finding was considered positive if reported by two or three of the radiologists. Results: Twenty subjects met the inclusion criteria. Muscle edema was present in 15% (3/20) of subjects within the iliacus, psoas, and quadratus femoris. Atrophy was observed in the following muscles: iliacus 85% (17/20), psoas 75% (15/20), quadratus femoris 10% (2/20), rectus femoris 5% (1/20), vastus lateralis 5% (1/20), and gluteus maximus 25% (5/20). There was no compensatory hypertrophy. Ninety percent (18/20) had increased T1 and 10% (2/20) had increased T2 signal within the iliopsoas tendon. Thirty-five percent (7/20) of the iliopsoas tendons was disrupted and 85% (17/20) was distorted, most commonly below the iliopectineal eminence. Conclusion: The majority of postoperative symptomatic patients has atrophy of the iliacus and psoas muscles and distortion and disruption of the iliopsoas tendon and should be recognized as a normal imaging appearance following iliopsoas tendon release. Hospital for Special Surgery, 2013 iliopsoas nationallicence tenotomy nationallicence muscle atrophy postoperative nationallicence Hain Kendra Department of Radiology, University of Wisconsin, 600 Highland Avenue, 53705, Madison, WI, USA aut Blankenbaker Donna Department of Radiology, University of Wisconsin, 600 Highland Avenue, 53705, Madison, WI, USA aut De Smet Arthur Department of Radiology, University of Wisconsin, 600 Highland Avenue, 53705, Madison, WI, USA aut Keene James Department of Orthopedics, University of Wisconsin, 600 Highland Avenue, 53705, Madison, WI, USA aut del Rio Alejandro Department of Radiology, University of Wisconsin, 600 Highland Avenue, 53705, Madison, WI, USA aut HSS Journal ® Springer US; http://www.springer-ny.com 9/3(2013-10-01), 236-241 1556-3316 9:3<236 2013 9 11420 https://doi.org/10.1007/s11420-013-9361-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11420-013-9361-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hain Kendra Department of Radiology, University of Wisconsin, 600 Highland Avenue, 53705, Madison, WI, USA aut NATIONALLICENCE 700 1- Blankenbaker Donna Department of Radiology, University of Wisconsin, 600 Highland Avenue, 53705, Madison, WI, USA aut NATIONALLICENCE 700 1- De Smet Arthur Department of Radiology, University of Wisconsin, 600 Highland Avenue, 53705, Madison, WI, USA aut NATIONALLICENCE 700 1- Keene James Department of Orthopedics, University of Wisconsin, 600 Highland Avenue, 53705, Madison, WI, USA aut NATIONALLICENCE 700 1- del Rio Alejandro Department of Radiology, University of Wisconsin, 600 Highland Avenue, 53705, Madison, WI, USA aut NATIONALLICENCE 773 0- HSS Journal ® Springer US; http://www.springer-ny.com 9/3(2013-10-01), 236-241 1556-3316 9:3<236 2013 9 11420 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer