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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Why My Knee Has A Bump On It?

I was kneeling, lost my balance, fell back onto my feet with my butt, and heard three loud pops in my knee (I "over-bent" my knee.... I immediately stetched my leg out to try and reduce the pain, it did not go away. Now I have a bump about the size of cherry at the base of my quad/right above my knee. Now I have pain in my calf, my knee hurts, and there is a bruide around the area. I can walk, and stand on it, but my knee does not feel stable (feels like i bends backwards more than normal).
Tue, 23 May 2017
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Sports Medicine Specialist,  's  Response
Hi. You could have torn a muscle(quadriceps) or the quadriceps tendon - hence the bump which is probably a haematoma(bleeding). With the unstable knee bending backwards, you could have torn one of the cruciate ligaments inside the knee, most likely the Posterior Cruciate ligament, which is responsible for stabilising backward movement of the knee. You need an MRI to assess the ligaments.
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Why My Knee Has A Bump On It?

Hi. You could have torn a muscle(quadriceps) or the quadriceps tendon - hence the bump which is probably a haematoma(bleeding). With the unstable knee bending backwards, you could have torn one of the cruciate ligaments inside the knee, most likely the Posterior Cruciate ligament, which is responsible for stabilising backward movement of the knee. You need an MRI to assess the ligaments.