Yearly mammogram showed stable right breast nodule consistent with benign etiology (br-rads 2 benign) stayed the same for 2 yrs should i be concern?

No concern: The mammo defines a malignant lesion as a stellate one usually with associated microcalcifications. A sono can suggest the nodule is a fibroadenoma or has fluid in it which is benign. An MRI can further elucidate the nature of the lesion. A malignancy does not remain stable in the breast but is noted to enlarge and invade surrounding tissue over a period of months.