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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Unexplained Hard Lump On The Sides Of Knee?

I have noticed a hard lump/knot on the side of my knee (right, inside). The past few months its became larger and now my leg calf bone is bowing and I have weakness in my right leg and mobility is off. I am 46 yrs old and I haven t sustained an injury. I workout 3-4x per week (lite weights and cardio - recumbent bike). What could this be? I m now experiencing hip / side discomfort.
Mon, 2 Mar 2015
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Pathologist and Microbiologist,  's  Response
Hi, thanks for sharing your health concerns with HCM!

If I were your treating Doctor for this case of hard lump on the side of your right knee, I would come up with three possibilities, these include:

1. a bursa or ganglion-like benign cystic lesion
2.     a lipoma or benign fatty tumor or neurofibroma
3.     collection of uric acid crystals (gouty tophus) in gouty arthritis

Overall, it is benign and not to worry about this but you could go for Fine needle aspiration biopsy / ultrasound test for confirmation and also consult a surgeon in your area!

Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions.

Wishing you good health.
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What Causes Unexplained Hard Lump On The Sides Of Knee?

Hi, thanks for sharing your health concerns with HCM! If I were your treating Doctor for this case of hard lump on the side of your right knee, I would come up with three possibilities, these include: 1. a bursa or ganglion-like benign cystic lesion 2. a lipoma or benign fatty tumor or neurofibroma 3. collection of uric acid crystals (gouty tophus) in gouty arthritis Overall, it is benign and not to worry about this but you could go for Fine needle aspiration biopsy / ultrasound test for confirmation and also consult a surgeon in your area! Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health.