Breast MRI shows it’s not the size of the lymph node that signals spread of cancer

Physicians treating breast cancer first look to lymph nodes in a patient’s armpit to see whether cancer is spreading elsewhere in the body — but they may not be evaluating the nodes in the most effective way.

Initial research suggested that enlargement and abnormalities of axillary sentinel lymph nodes – located in the armpit area near the breast – were predictive of cancer. But a University of Florida Shands Cancer Center researcher says it’s not the size of the node or enhancement, but the loss of a key part of a normal node’s structure called the fatty hilum that more accurately signals the spread of disease. The findings are available online in the Journal of Magnetic Resonance Imaging.

In addition to changing ideas about what doctors should look for while evaluating lymph nodes, the finding reinforces the value of using MRI to determine the extent of breast cancer prior to surgery.

source: University of Florida College of Medicine