Mammograms are an essential part of healthcare for women and individuals of any gender who are experiencing abnormalities in the breast tissue, have a family history of breast cancer, or have been born with the BRCA gene that increases the risk of breast cancer. However, getting the test results may leave patients with questions, as mammography reports are not always written in terms meant for non-medical professionals to understand.
Despite this, mammography reports all use the same layout and numerical system—so by having knowledge of BI-RADS, the Breast Imaging Reporting and Data System, patients can read their mammogram results and take a more active role in their own healthcare.
Here is what patients need to know.
What Is Included in a Mammogram Report?
Your doctor may have recommended a mammogram to check on a specific issue, or it may simply have been time for a routine mammogram to detect early changes associated with breast cancer. Regardless of the reason, the test itself will typically evaluate the same criteria:
- The composition of the breast (how much fat vs fibrous tissue))
- The position and size of any identified masses (relative to the location of the nipple)
- The location of any calcium deposits inside the breast tissue
- The level of asymmetry between the two breasts
- General features of the breast (nipple size, skin thickness)
Once this information is collected, the report will be synthesized using the BI-RADS scale. This numerical system ranks potential abnormalities and other areas of concern, providing a value that dictates what steps should be taken next.
Interpreting the BI-RADS Scale
The BI-RADS scale is a six-point system; it begins at zero and ends at six, and all results from the mammogram will be sorted into these categories. Patients can look at their BI-RADS score to understand the mammogram’s findings.
Category 0
A mammogram classed as zero on the BI-RADS scale is incomplete or part of a series. Occasionally, mammography can produce unclear results (such as if the patient moves during the exam) or the radiologist may detect a new breast mass or other changes that need further assessment.
The medical team may want to take additional images to obtain different views or to compare them to prior results. In these cases, the mammogram cannot stand alone as a diagnostic tool, so it receives a score of zero. The patient should return to the office for additional imaging.
Category 1
Patients whose mammogram results have been assigned a BI-RADS value of one have a negative test. In other words, the doctors could not find any abnormalities or areas of concern. This is good news, but continue to get mammograms regularly to identify issues while they are still minor.
Category 2
If breast tissue is categorized as BI-RADS two, the result is negative, but doctors may have described elements of the breast that were non-cancerous. For instance, if an individual has a harmless cyst in one breast, their BI-RADS result would be a two; this is normal and is no cause for concern.
Category 3
Sometimes, a doctor may find abnormal tissue, but there is only a slight chance it is cancerous. This is a typical category three case. Patients in category three should return in six months for another mammogram to see if the area has changed.
Category 4a, 4b, 4c
Patients assigned a BI-RADS four have mammogram results that are suspicious of cancer. The subcategories (a, b, and c) indicate how likely the tissue is to be cancerous (2-10%, 10-50%, and 50-95%, respectively). A breast biopsy is recommended to sample the tissue and determine next steps.
Category 5
A BI-RADS score of five indicates that the imaged tissue is at least 95% likely to be cancerous. The doctor will do a biopsy to identify the cancer cells (if present) and begin creating a treatment strategy.
Category 6
Some patients are aware that they have breast cancer and continue to receive mammograms, either to check on the efficacy of treatment or to see whether the cells are growing in new locations.
The BI-RADS category six exists to describe these patients and is only used in cases of existing breast cancer diagnoses.
Maintain Breast Health Through Regular Gynecological Care
Getting regular mammograms is one of the most important decisions patients can make when investing in good long-term health. Breast cancer is often highly treatable if it is caught in its earliest stages, and mammograms provide useful imaging to identify problematic tissue in its infancy.
The professional team at Raleigh Gynecology & Wellness is always eager to educate our patients on the importance of mammograms and how to interpret their results. Contact Raleigh Gynecology & Wellness to schedule your mammogram!