At bottom of post Surgical Clinics of North America issue on postoperative complications.

“The reported complication rates after breast cancer surgery are low, with rates ranging
from 2% to 50%, and are reportedly more common when performed in conjunction with axillary surgery and immediate breast reconstruction. A breakdown by procedure type has shown morbidity rates between 5% and 50% after mastectomy and from 3% to 35% after lumpectomy with or without reconstruction.”