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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Sharp Painful Swelling In The Knee After An ACL Sprain?

About 9 weeks ago I injured my left knee. I was told on Monday that its a low grade ACL sprain. Trying therapy for a month then go back. If not better surgeon said he would go in and look. Is it normal that long after an ACL sprain that is low grade, for the whole leg to be swollen and have sharp knee pain that is not helped with medication and is continuous, I can not fully straighten or bend left leg.
Tue, 11 Oct 2016
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Radiologist, Interventional ,  's  Response
This could be an inflammation of the knee joint secondary to the previous injury. The swelling is likely to be due to knee joint effusion, which is a fluid reaction to inflammation. Especially that there is limitation of movements.

You should have your knee clinically examined. An ultrasound examination of the knee is a quick and helpful way for better assessment of the knee condition. MRI might be required if the clinical examination and Ultrasound were not sufficient.

I hope that answered your concerns clearly. Best wishes.
Regards.





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What Causes Sharp Painful Swelling In The Knee After An ACL Sprain?

This could be an inflammation of the knee joint secondary to the previous injury. The swelling is likely to be due to knee joint effusion, which is a fluid reaction to inflammation. Especially that there is limitation of movements. You should have your knee clinically examined. An ultrasound examination of the knee is a quick and helpful way for better assessment of the knee condition. MRI might be required if the clinical examination and Ultrasound were not sufficient. I hope that answered your concerns clearly. Best wishes. Regards.