This article is from the Plastic and Reconstructive Surgery FAQ, by firstname.lastname@example.org (Robert Green) with numerous contributions by others.
The axillary approach has several advantages for most patients.
First, it does not invade the breast tissues directly, going
underneath instead. Secondly, there is no scar left on the skin of
the breast -- instead the scar is located in the armpit area,
which is a much less noticeable location. This is the preferred
approach for patients who have do not have pendulous (saggy)