title: Correlation between Magnetic Resonance Imaging Characteristics of the Patellar Tendon and Clinical Scores in Osgood-Schlatter Disease.
abstract: OBJECTIVE
  This study aims to evaluate magnetic resonance imaging (MRI) findings in young adults with symptomatic Osgood-Schlatter disease (OSD) and compare those in young adults without OSD.
  
  
  METHODS
  We compared MRI findings between young adults with OSD (OS group, n=30) and the equivalent number of young adults without OSD (control group). Visual analog scale scores and Kujala scores were evaluated and correlation analysis was performed in the OS group.
  
  
  RESULTS
  In the OS group, MRI revealed that the patellar tendon was attached to the tibia more widely, resulting in a reduced free tendon portion, and more proximally to the articular surface (p<0.001). The correlation analysis between MRI findings and clinical scores showed statistically significant correlations (p<0.01). In the OS group, 43% presented with patellar tendinopathy or bone marrow edema at the distal attachments.
  
  
  CONCLUSIONS
  Compared to the control group, the relatively small free portion and relatively proximal attachment of the patellar tendon were observed with MRI in the OS group. The free portion of the patellar tendon was positively correlated with the clinical scores. Patellar tendinopathy was also frequently encountered in the OS group.
authors.affiliation: Department of Orthopedic Surgery, Daejeon Military Hospital, Daejeon, Korea.
authors.forename: Dhong Won
authors.initials: DW
authors.lastname: Lee
authors.affiliation: Department of Raiology, Ewha Womans University Mokdong Hospital, Seoul, Korea.
authors.forename: Min Jeong
authors.initials: MJ
authors.lastname: Kim
authors.affiliation: Department of Orthopedic Surgery, Soonchunhyang University Cheonan Hospital, Cheonan, Korea.
authors.forename: Woo Jong
authors.initials: WJ
authors.lastname: Kim
authors.affiliation: Department of Orthopedic Surgery, Inje University Seoul Paik Hospital, Seoul, Korea.
authors.forename: Jeong Ku
authors.initials: JK
authors.lastname: Ha
authors.affiliation: Department of Orthopedic Surgery, Konkuk University Medical Center, Seoul, Korea.
authors.forename: Jin Goo
authors.initials: JG
authors.lastname: Kim
keywords: Knee; Magnetic resonance imaging; Osgood-Schlatter disease; Patellar tendon; Tendinopathy; Tibia