A mastectomy might be recommended for treatment of DCIS if:
- the area of DCIS is large compared to the size of the breast
- the DCIS and/or microcalcification is in more than one area of the breast
- after breast conserving surgery, the area of DCIS is larger than it appeared on the mammogram, or there are DCIS cells in the surgical margin
- a woman has been treated previously with radiotherapy for DCIS and DCIS has come back in the same breast (radiotherapy can’t be used to treat the same breast again).
The woman’s age, family history of breast cancer and treatment preference will also be considered.