Thanks Steve, great explanations that are easy to understand.

I assisted in a PRP inj for a Semimembranosus tear and I was reading the report as follows:
Acute high grade partial tear SM tendon at mid thigh level, towards prox MTJ with involvement of >50% cross sectional area of tendon, with redundant prox & dist tendon edges lying within haemorrhagic fluid collection. Adjacent feathery intramuscular odema & muscle architectural distortion => consistent w British athletics grade 3C injury

Does “redundant” in this case mean that there is 2 tendon stumps? So it is full thickness/complete tear?

Out of interest, I did some preliminary imaging/taking clips/comparing to other side and the US appearance looks a bit underwhelming to me as I can see a thickened, hypoechoic SM prox tendon, not much haematoma to see the tendon “stumps”/disruption but apparent muscle heterogeneity/hyperechogenicity at its MTJ.

2) How do you differentiate from the sonographic appearances of DOMS and rhabdomyolysis since the mechanism of injury is roughly the same?

Best regards,

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