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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Movable Lump In Knee?

My 8 year old son developed a lump to the side of his left knee 2 days ago. The pediatrician thinks it is either a ganglion cyst or baker's cyst. However I am taking him to an orthopedic surgeon to verify this with further testing. I want to make sure 100% that this is what it is, and not some type of tumor. It is some what moveable, but from what I've read so are some type of soft cell sarcoma's. Any information you can provide would be helpful. The lump goes Up and down, it is more long than wide, not a perfect circle, by any means. More oblong. Thank you.
Thu, 18 Sep 2014
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General & Family Physician 's  Response
Welcome to health care magic.

1.Your description suggest me that its a ganglion cyst, which is developed from an joint structures like tendon, ligament and nerve sheet.
2.Its good to get it examined what you are doing, to evaluate the lesion / lump - an ultrasound examination will help.
3.Ultrasound will help in evaluating the nature of the lump, its source and extensions.
4.But ideal investigation of choice is MRI for one joined - which will give accurate diagnosis from which structure it come from.
5.Treatment is followup, if any discomfort a small incision and drainage with a course of antibiotic will help. Good luck.

Hope i have answered your query.
Any thing to ask do not hesitate. Thank you.
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What Causes Movable Lump In Knee?

Welcome to health care magic. 1.Your description suggest me that its a ganglion cyst, which is developed from an joint structures like tendon, ligament and nerve sheet. 2.Its good to get it examined what you are doing, to evaluate the lesion / lump - an ultrasound examination will help. 3.Ultrasound will help in evaluating the nature of the lump, its source and extensions. 4.But ideal investigation of choice is MRI for one joined - which will give accurate diagnosis from which structure it come from. 5.Treatment is followup, if any discomfort a small incision and drainage with a course of antibiotic will help. Good luck. Hope i have answered your query. Any thing to ask do not hesitate. Thank you.