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First thing needed to be diagnosed is what the lump of?since it is diagnosed with some investigation, you need discuss with your doctor about the type of lump. You said you can push it. so it is not bone tumor
. it seems a soft tissue
lump. any lump can be treated. there may be chances of a simple lipoma
, or some benign or malignant tumor. please consult the doctor in detail. here without examination cant be said anything.
I hope I answered your query. Wish you good health.