I am an average sized woman, and the lump was taken from the outer edge of the breast
(if you were facing me, it would be on the right side -- my left breast
-- at the 3 o'clock position.) Surgery was terrifying to me, but the result was almost imperceptible. Radiation, however, was another story for me. Results vary widely from radiation, and you would do well to read up on this. I am blonde with super sensitive skin.