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. 2024 Mar 1;59(3):270-273.
doi: 10.4085/1062-6050-0064.23.

Hamstring Strain Ultrasound Case Series: Dominant Semitendinosus Injuries in National Collegiate Athletic Association Division I Athletes

Brandon V Hassid  1 , Alexandra E Warrick  1 , Jeremiah W Ray  2
Affiliations

Hamstring Strain Ultrasound Case Series: Dominant Semitendinosus Injuries in National Collegiate Athletic Association Division I Athletes

Brandon V Hassid et al. J Athl Train. .

Abstract

Authors of previous studies of patients with acute hamstring strains have reported injury to the biceps femoris and semitendinosus (ST) in 50% to 100% and 0% to 30%, respectively. This retrospective case series of hamstring injuries in National Collegiate Athletic Association Division I collegiate athletes exhibited an injury pattern on ultrasound imaging that differed from what would be expected based on prior literature. We examined ultrasound images of 38 athletes with acute hamstring strains for injury location (proximal muscle, proximal myotendinous junction, midportion of muscle, distal muscle) and affected muscles (biceps femoris, ST, or semimembranosus). Twenty-six athletes (68.4%) injured the ST, and 9 athletes (23.7%) injured the biceps femoris long head. Most athletes (23, 60.5%) injured the proximal portion of the muscle or myotendinous junction. Though this study had many limitations, we demonstrated more frequent involvement of the ST and less frequent involvement of the biceps femoris than reported in the literature.

Keywords: athletic injuries; biceps femoris; lower extremity; thigh.

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Figures

Figure
Figure
Proximal semitendinosus (ST) injury—athlete Z. A, Transducer position for B and C. B, Short axis sonographic image of the proximal hamstrings demonstrating a 1.28- × 0.79-cm tissue defect. C, Long axis ultrasound image demonstrating a 3.11-cm tissue defect. Abbreviation: BFLH, biceps femoris long head.
See this image and copyright information in PMC

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