title: Prediction of semitendinosus and gracilis autograft sizes for ACL reconstruction.
abstract: OBJECTIVE
  The aim of this study was to predict the hamstring graft sizes prior to anterior cruciate ligament reconstruction surgery in adults by using preoperative magnetic resonance imaging (MRI).
  
  
  METHODS
  Fifty-one patients with anterior cruciate ligament rupture were prospectively evaluated. Diameter and cross-sectional areas of the gracilis and the semitendinosus tendons at two different levels were measured separately by preoperative MRI. In surgery, harvested gracilis and semitendinosus tendons were measured individually (2-stranded) and together (4-stranded) by using a graft sizing block. Radiological and operative sizes of the grafts were compared by Pearson's correlation test. ROC analysis was done to determine a possible cutoff value for the preoperative measurements.
  
  
  RESULTS
  There were statistically significant correlations between the MR cross-sectional areas of gracilis, semitendinosus, gracilis + semitendinosus and intraoperative graft sizes of 2-stranded gracilis, 2-stranded semitendinosus and 4-stranded gracilis + semitendinosus tendons [P < 0.05]. No significant correlation was observed between the MR diameters of the gracilis, semitendinosus, gracilis + semitendinosus tendons and intraoperative graft sizes of 2-stranded gracilis, 2-stranded semitendinosus and 4-stranded gracilis + semitendinosus tendons [n.s].
  
  
  CONCLUSIONS
  Cross-sectional areas of the hamstring tendons in MR images can be used to estimate the sizes of hamstring grafts prior to anterior cruciate ligament reconstruction surgery which may be very helpful to predict possible graft insufficiencies and take precautions if needed.
  
  
  METHODS
  Level IV.
authors: Department of Orthopedics and Traumatology, Yeditepe University School of Medicine, Istanbul, Turkey.
authors: Tahsin
authors: T
authors: Beyzadeoglu
authors: Umut
authors: U
authors: Akgun
authors: Neslihan
authors: N
authors: Tasdelen
authors: Mustafa
authors: M
authors: Karahan
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D019412:Anatomy, Cross-Sectional; D016118:Anterior Cruciate Ligament / Q000601:surgery*; D000070598:Anterior Cruciate Ligament Injuries; D059549:Anterior Cruciate Ligament Reconstruction; D005260:Female; D006801:Humans; D007432:Intraoperative Period; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011300:Preoperative Care; D011446:Prospective Studies; D012372:ROC Curve; D013710:Tendons / Q000033:anatomy & histology* / Q000637:transplantation*; D055815:Young Adult