Semin Musculoskelet Radiol 2017; 21(04): 415-432
DOI: 10.1055/s-0037-1604005
Review Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Imaging of Acute Hamstring Muscle Strain Injuries

Simon Dimmick1, James M. Linklater1, 2, 3
  • 1Castlereagh Imaging, Westmead, Australia
  • 2University of Sydney, Northern Clinical School, Royal North Shore Hospital, New South Wales, Australia
  • 3University of New South Wales, Faculty of Medicine, Kensington, Australia
Further Information

Publication History

Publication Date:
03 August 2017 (online)

Abstract

Acute athletic hamstring muscle strain injuries are common and a cause of significant time off sport. An understanding of the anatomy of the hamstring muscle-tendon units is a prerequisite for interpreting the spectrum of structural abnormalities on imaging. The site of injury may range from proximal tendon, proximal myotendinous junction, with or without tendon injury, muscle, myofascial junction, distal myotendinous junction to distal tendon. Imaging findings in muscle injury range from intrafascicular and interfascicular muscle edema, blurring of fascicular margins, distortion of pennation angle, localized muscle fascicle discontinuity through to more extensive multi-fascicular discontinuity. Imaging findings in tendon injury include tendon edema, redundancy, zipper-like morphology, and partial-complete tendon discontinuity. Imaging findings in fascial injury include poor definition of fascial margins with perifascial edema through to a fascial defect. Published grading systems are presented, and their so far limited utility in predicting return to play is reviewed.