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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Hard Bump Behind The Knee?

I have a very odd bump beside my knee...it's on the inside. The skin on the outside is a little saggier than on my right knee. When I press down hard, there is a bump and it feels a lot different than my right knee. Also, my knee has been hurting going up stairs, or standing at times. it cracks sometimes when I extend it.
Tue, 17 Jun 2014
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General Surgeon 's  Response
Hello! Welcome to HCM.
This is more likely a William Morrant Baker's cyst.
Its a benign swelling in a synovial bursa.
Local examination is necessary for diagnosis.
In my clinic, I advise excision biopsy for symptomatic cysts.
Excision biopsy means the lump is excised & sample is sent for histopathologcal examination.
Hope this helps.
Wish you a good health.
Thanks.
Regards.
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What Causes Hard Bump Behind The Knee?

Hello! Welcome to HCM. This is more likely a William Morrant Baker s cyst. Its a benign swelling in a synovial bursa. Local examination is necessary for diagnosis. In my clinic, I advise excision biopsy for symptomatic cysts. Excision biopsy means the lump is excised & sample is sent for histopathologcal examination. Hope this helps. Wish you a good health. Thanks. Regards.