"the nodes are - without exception - smoothly circumscribed and well defined. If the lesion is not very neatly and clearly outlined or loses this feature on follow up studies, it is not a simple node."
"the nodes are low density lesions. If they are projected over the profile of the muscle, you will see the muscle through the node. If this feature disappears or the "node" increases in density on follow up you are not dealing with a simple lymph node. To judge the density of a node, look for one in the tail of the breast on the MLO view - they should have similar densities."
"The intramammary lymph nodes (IMLN) (a.k.a. intramammary nodes) are lymph nodes within the breast tissue. In breast imaging, they generally fall into BIRADS II lesions 7. They can be solitary or multiple. This article discusses normal (physiological) intramammary lymph nodes."
"There are two critical issues in evaluating intramammary lymph nodes on mammograms:"
Expected headings
"Epidemiology"
"Mammography"
"Significance"
"There are two critical issues in evaluating intramammary lymph nodes on mammograms:"