What is a breast biopsy?

A breast biopsy is a procedure performed while in the office while you’re awake to obtain a sample of tissue to evaluate a breast lump or an abnormality that was seen on a mammogram, ultrasound or MRI. Copious amounts of local anesthetic (numbing medicine) are used to the numb the skin and deeper tissue in the breast to minimize discomfort. A needle is then placed in the abnormality in the breast to obtain tissue. A small marker is usually left to mark the location where the biopsy was taken. The tissue is then sent to the pathologist to be evaluated under the microscope and obtain a diagnosis. Breast biopsies are usually performed using breast imaging guidance, usually an ultrasound or a mammogram machine. Results from the biopsy usually are available in one or two business days.

Breast Cancer Margin Guidelines for DCIS
Breast Biopsy tissue is sent to the pathologist to establish a diagnosis for the abnormal finding on mammogram or ultrasound, or a breast lump.