Presentation
Sports injury. Posterior thigh pain.
Patient Data
Injury to the proximal myotendinous junction of biceps femoris with hyperintensity extending for a craniocaudal length of approximately 16 cm involving more than 50% cross-sectional diameter of the muscle belly. Fiber disruption length of approximately 9 cm with involvement of the central tendon slip. There is extension to the fascia with myofascial fluid both posterior and anterior, notably with fluid tracking around the sciatic nerve. There is no extension into the proximal free tendon nor any involvement of the distal myotendinous junction or free tendon.
Case Discussion
The proximal myotendinous junction of biceps femoris is the most common site of a hamstring injury. Using the British Athletics muscle injury classification this is grade 3c (extensive).
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