Breast Biopsy Test
A breast biopsy removes a small sample of breast tissue so a pathologist can check it under a microscope for signs of disease or cancer. It is the only way to know for sure if a suspicious change in your breast is cancer.
What this test measures
A breast biopsy removes a sample of breast tissue so a pathologist can look at it under a microscope for signs of disease and cancer.
What your results mean
Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.
Frequently asked questions
What is a breast biopsy?
A breast biopsy is a procedure that removes a sample of breast tissue so a pathologist can look at it under a microscope for signs of disease and cancer.
What are the different types of breast biopsy?
There are three types: fine needle aspiration biopsy (uses a very thin needle), core needle biopsy (uses a larger needle and sometimes a vacuum probe), and surgical biopsy (surgery to remove tissue).
How long does it take to get results?
It may take several days to a week to get your biopsy results, often called a pathology report.
What can the results show?
Results can be normal (no cancer), abnormal changes that aren't cancer, abnormal changes that increase cancer risk, or breast cancer.
What happens if cancer is found?
If cancer cells are found, the report will include details about how fast the cells are growing, how much they look like normal cells, and other information to help plan treatment.
Related lab tests
Sources
- MedlinePlus: Breast Biopsy — NIH MedlinePlus
Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.