How does a breast MRI compare to a mammogram in terms of sensitivity?

A breast MRI is known for its higher sensitivity compared to a mammogram, particularly in detecting breast cancer in certain populations. This heightened sensitivity is largely due to the MRI's ability to capture detailed images of breast tissue and its superior contrast resolution. MRI can identify tumors that may be missed by mammograms, especially in women with dense breast tissue or in those who are at high risk for breast cancer.

The effectiveness of MRI also extends beyond initial detection; it serves as a valuable adjunct to mammography and can be particularly useful in assessing the extent of known breast cancers, evaluating the response to treatment, or monitoring high-risk patients. However, it's important to note that while breast MRI is more sensitive, it may also result in a higher rate of false positives, which can lead to unnecessary biopsies.

In contrast, mammography remains a crucial tool for breast cancer screening, particularly in the general population. While it is less sensitive than MRI, it is commonly used due to its accessibility, lower cost, and effectiveness in early detection of breast cancer in women with average risk.