If it isn't the two common conditions listed above - and a good sonographer should be able to tell - then a solid lesion of that size should definitely be seen by a general or orthopedic surgeon and undergo a core needle biopsy prior to surgery. It could represent a sarcoma or other tumor. If you had previous injury to that area it may be a hematoma, but that can usually be diagnosed on us.
Answered Aug 19, 2013
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