t see why would one let the fibroadenoma grow to the point of filling the whole
breast .A surgery for fibroadenoma is done if the
lump is causing pain and is large (About 3 to 4cm). Otherwise, conservative management with regular follow ups is advisable as these usually regress post menopause.
If you have been advised surgery, then you need to discuss with your surgeon the procedure details, the approximate size of the lump that would be removed.