Semimembranosus injury - BAC grade 3c

Case contributed by Dr Henry Knipe


Persisting hamstring tightness in last week's game.

Patient Data

Age: 20-25 years
Gender: Male


Extensive abnormality of the semimembranosus muscle centered on the proximal central tendon slip/musculotendinous junction. Mild irregularity of the central tendon slip with mild waviness of contour of the posteromedial aspect of this tendon slip, representing central tendon slip injury/tear. STIR hyperintensity is for 21.5 cm in length with 5 cm of fiber disruption. >50% cross-sectional diameter is involved. 

Mild extension of edema to the posteromedial myofascial interface with mild fluid signal around the sciatic nerve.

Slightly more superiorly there is a small area of increased signal within the biceps femoris tendon adjacent to the central tendon slip. No other focal abnormality is identified.

Case Discussion

There are two muscle injuries present:

  • semimembranosus - BAC grade 3c
  • biceps femoris - BAC grade 1b
PlayAdd to Share

Case information

rID: 69797
Published: 22nd Jul 2019
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.