title: Quadratus femoris tear as an unusual cause of hip pain: a case report.
abstract: OBJECTIVE
  To show that quadratus femoris muscle partial or complete tear is an extremely rare if not underdiagnosed cause of hip pain.
  
  
  METHODS
  We present the case of a 75-year-old Caucasian woman with spontaneous non-traumatic quadratus femoris tear.
  
  
  RESULTS
  Computed Tomography showed quadratus femoris tear with occult underlying ischiofemoral impingement pathology.
  
  
  CONCLUSIONS
  Quadratus femoris muscle is a hip external rotator and adductor and is situated along the posterior aspect of the hip joint and its proximity of anatomy with other external rotators leads to diagnostic pitfalls for radiologists. Identification of the exact muscle tear will establish the diagnosis, guide the proper physical therapy and reliably inform the patient what to expect after treatment.
authors.affiliation: Department of Anatomy, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa - Greece.
authors.forename: Aristeidis H
authors.initials: AH
authors.lastname: Zibis
authors.affiliation: Department of Anatomy, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa - Greece.|Department of Orthopedics, General Hospital of Karditsa, Karditsa - Greece.
authors.forename: Apostolos H
authors.initials: AH
authors.lastname: Fyllos
authors.affiliation: Department of Radiology, University Hospital of Heraklion, Heraklion, Crete - Greece.
authors.forename: Apostolos H
authors.initials: AH
authors.lastname: Karantanas
authors.affiliation: Department of Anatomy, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa - Greece.
authors.forename: Vasileios
authors.initials: V
authors.lastname: Raoulis
authors.affiliation: Department of Orthopaedic Surgery, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa - Greece.
authors.forename: Theophilos S
authors.initials: TS
authors.lastname: Karachalios
authors.affiliation: Department of Anatomy, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa - Greece.
authors.forename: Dimitrios L
authors.initials: DL
authors.lastname: Arvanitis
mesh_terms: D000368:Aged; D018771:Arthralgia / Q000000981:diagnostic imaging* / Q000209:etiology* / Q000628:therapy; D005260:Female; D006621:Hip Joint; D006801:Humans; D018482:Muscle, Skeletal; D059352:Musculoskeletal Pain / Q000000981:diagnostic imaging* / Q000209:etiology* / Q000628:therapy; D012422:Rupture, Spontaneous; D014057:Tomography, X-Ray Computed