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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Is The Cause Of Painful Fatty Lump Under The Knee?

I have what appears to be a fatty lunch under my knee to the right - it's about 3" x 3 inches and pretty thick - it's semi firm and the area around it is so sore to the touch. Past few months it hurts almost all the time and the w hole region has a dull ache to it. 24/7.
Mon, 23 Mar 2015
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Pathologist and Microbiologist 's  Response
Hi! thanks for your post and giving us an opportunity to discuss on the knee lumps!

I must, again, describe your lump as painful, fatty, firm and thick; and I must consider followings as possibilities, according to my routine clinical experience:

1. a bursa or inflamed degenerative cystic tumor like condition: 50% possibility

2. benign lipomatous tumor like angiolipoma 30% possibility

3. atypical fatty tumors like dermatofibroma, liposarcoma, fibrosarcoma etc 10% possibility

4. other infective or inflammatory lesions 10% possibility

Therefore, you must not neglect this and better see your doctor today for some basic tests to confirm the nature of this lesion and thereby relieve your tension...!

Wishing you good health,
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What Is The Cause Of Painful Fatty Lump Under The Knee?

Hi! thanks for your post and giving us an opportunity to discuss on the knee lumps! I must, again, describe your lump as painful, fatty, firm and thick; and I must consider followings as possibilities, according to my routine clinical experience: 1. a bursa or inflamed degenerative cystic tumor like condition: 50% possibility 2. benign lipomatous tumor like angiolipoma 30% possibility 3. atypical fatty tumors like dermatofibroma, liposarcoma, fibrosarcoma etc 10% possibility 4. other infective or inflammatory lesions 10% possibility Therefore, you must not neglect this and better see your doctor today for some basic tests to confirm the nature of this lesion and thereby relieve your tension...! Wishing you good health,