What are some commonly observed benign breast masses?
One commonly observed mass is a normal intramammary lymph node. This will commonly present as a round or oval mass less than 1 cm in size with circumscribed margins. Lymph nodes will also generally have high T2-weighted signal intensity and washout enhancement kinetics. Careful assessment of the non-fat-suppressed T1-weighted images may demonstrate bright central fatty hila. The corresponding areas will have low signal intensity on the fat-suppressed T1-weighted images.
Another commonly observed benign mass is a fibroadenoma. This will commonly present as an oval mass with circumscribed margins and homogeneous enhancement. Fibroadenomas will also generally have homogeneous high T2-weighted signal intensity and persistent enhancement kinetics.