Hello,
This soft tissue lump can be a cyst or a benign tumor like lipoma or sarcoma. Exactly what it is can be ascertained only after FNAB. FNAB is aspiration of the material of the glands which is done by a fine gauge needle (22 or 25 gauge) and a syringe. This will confirm the diagnosis.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Let me start by saying congratulations!
It could be a soft tissue sarcoma. Harmless enough, but annoying.
Not sure what exactly the sonogram is going to show, but I'm sure your doctor would do a biopsy for you if you ask.
Was blood work done?