title: Stress-related injuries around the lesser trochanter in long-distance runners.
abstract: OBJECTIVE
  Imaging abnormalities around the lesser trochanter are occasionally found in long-distance runners, yet little research has been conducted concerning this area of the hip. In addition, the relation between iliopsoas insertional abnormalities at the lesser trochanter and femoral neck stress injuries has not been examined, to our knowledge. We report MRI findings at the lesser trochanter in nine long-distance runners with hip or groin pain and a consistent constellation of the following findings: abnormalities associated with the iliopsoas tendon and its insertion, including marrow edema at the lesser trochanter; periostitis around the lesser trochanter; and bone marrow edema in the femoral neck. One case involved temporal progression to a cortical fracture.
  
  
  CONCLUSIONS
  Long-distance runners with hip or groin pain and abnormal MRI findings involving the insertion of the iliopsoas tendon and marrow edema in the lesser trochanter may be at risk of stress injuries at the femoral neck.
authors.affiliation: Magnetic Resonance Imaging, Radiology, Long Beach Memorial Medical Center, Long Beach, CA, USA.
authors.forename: Josephine T
authors.initials: JT
authors.lastname: Nguyen
authors.forename: Jeffrey S
authors.initials: JS
authors.lastname: Peterson
authors.forename: Sandip
authors.initials: S
authors.lastname: Biswal
authors.forename: Christopher F
authors.initials: CF
authors.lastname: Beaulieu
authors.forename: Michael
authors.initials: M
authors.lastname: Fredericson
mesh_terms: D000328:Adult; D012090:Cumulative Trauma Disorders / Q000473:pathology*; D005260:Female; D005265:Femoral Neck Fractures / Q000473:pathology*; D005270:Femur Head / Q000473:pathology*; D015775:Fractures, Stress / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D012420:Running / Q000293:injuries*