lumpectomy vs mastectomy

if a woman decides to go ahead with mastectomy instead of needle localization lumpectomy, is the needle localization still a necessary procedure?

[Cleveland Clinic]

Dear hillgirl, Needle localization sometimes will still be necessary in some circumstances.  For example, when there is a very small area that can only be visualized by mammogram localization may be needed to in order to aid in sentinel lymph node biopsy procedure.  

[japdip]

NO ... there would be no need to identify the suspicious area with a wire insertion if you are having the entire breast removed unless the Pathologist requested it.