Fibroadenoma (benign breast lump)--do i need removal or surgery?

How do you know: It is a fibroadenoma only if it has not been excised? And I do not know the distinction between "removal" & "surgery". It needs to be excised to prove diagnosis and margins, and assure there is no other surprised microscopically.

Benign: A fibroadenoma is a very common benign breast mass that is found either incidentally on mammogram or ultrasound or is felt as a breast lump by the patient. Depending on the appearance and size of a fibroadenoma on imaging, it can be followed up, biopsied, or surgically removed. The majority however are left alone.