title: Is there a relationship between psoas impingement and increased trochanteric retroversion?
abstract: The concept of psoas impingement secondary to a tight or inflamed iliopsoas tendon causing impingement of the anterior labrum during hip extension has been suggested. The purpose of this study was to assess the relationship between the lesser trochanteric version (LTV) in symptomatic patients with psoas impingement as compared with asymptomatic hips. The femoral neck version (FNV) and LTV were evaluated on axial magnetic resonance imaging, as well as the angle between LTV and FNV. Data from 12 symptomatic patients and 250 asymptomatic patients were analysed. The mean, range and standard deviations were calculated. Independent t-tests were used to determine differences between groups. The lesser trochanteric retroversion was significantly increased in patients with psoas impingement as compared with asymptomatic hips (-31.1° SD ± 6.5 versus -24.2° ± 11.5, P < 0.05). The FNV (9° ± 8.8 versus 14.1° ± 10.7, P > 0.05) and the angle between FNV and LTV (40.2° ± 9.7 versus 38.3° ± 9.6, P > 0.05) were not significantly different between groups. In conclusion, the lesser trochanteric retroversion is significantly increased in patients with psoas impingement as compared with asymptomatic hips.
authors.affiliation: 1. Hip Preservation Center, Baylor University Medical Center, Dallas, USA; 2. Department of Orthopaedic Surgery, University of Antioquia, Medellin, Colombia, USA.
authors.forename: Juan
authors.initials: J
authors.lastname: Gómez-Hoyos
authors.affiliation: 1. Hip Preservation Center, Baylor University Medical Center, Dallas, USA.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Schröder
authors.affiliation: 1. Hip Preservation Center, Baylor University Medical Center, Dallas, USA; 3. Texas A&M Health Science Center College of Medicine, Dallas, USA.
authors.forename: Manoj
authors.initials: M
authors.lastname: Reddy
authors.affiliation: 1. Hip Preservation Center, Baylor University Medical Center, Dallas, USA.
authors.forename: Ian J
authors.initials: IJ
authors.lastname: Palmer
authors.affiliation: 1. Hip Preservation Center, Baylor University Medical Center, Dallas, USA; 4. Department of Bioengineering, University of Texas, Arlington, USA.
authors.forename: Anthony
authors.initials: A
authors.lastname: Khoury
authors.affiliation: 1. Hip Preservation Center, Baylor University Medical Center, Dallas, USA.
authors.forename: Hal David
authors.initials: HD
authors.lastname: Martin