Is mastectomy good for an invasive & in situ lobular carcinoma, stage 1b, sbr grade 2, 8 mm in size with good margins except anterior margin 1.5mm ?

Mastectomy: Mastectomy and lumpectomy are the 2 standard surgical procedures for breast cancer. Most evidence suggests they are equally effective in treating this disease.

Concern: The 1.5mm margin anteriorly is the only margin that gives me concern. For patients undergoing lumpectomy, obtaining at least a 2mm margin is associated with a decreased risk of recurrence. It would not be usual practice to take you back to surgery for a re-excision of this margin, however.