Dense or not dense—these terms on a mammogram report are not about how your breasts look or feel. Rather, they highlight the type of breast tissue you have, which can help guide the best approach to cancer screening.

Kidney damage that appears to heal can still mutate the mitochondrial DNA in kidney cells, making the organ less capable of handling future stress. Over time, these mutations reduce kidney function, according to a study by UT Southwestern Medical Center researchers.