GAMUT I-15-S
BENIGN BREAST LESIONS THAT CAN BE IGNORED WHEN CLASSICAL*


COMMON
1. Accessory breast tissue (no atypical features)
2. Arterial calcification (parallel calcifications; Mönckeberg's calcification)
3. Fat necrosis (with characteristic rim calcification)
4. Fibroadenoma, involuting (with characteristic calcification such as shell or popcorn)
5. Fibroadenolipoma (hamartoma)
6. Intramammary lymph node (normal size, shape, and density; fatty lucency centrally)
7. Milk of calcium crystals (calcifications layering concave up on true lateral view)
8. Oil cyst (posttraumatic fat necrosis, fatty lucency centrally)
9. Hematoma (history of blunt trauma such as motor vehicle accident, seat belt or steering wheel injury--not infected)
10. Raised skin lesion (eg, verrucous wart; seborrheic keratosis)
11. Secretory calcifications (plasma cell mastitis--rod shaped calcifications larger than 0.5 mm thick)
10. Skin calcifications (size less than 0.5 mm; rim calcification with lucent center)


UNCOMMON
1. Cyst with rim or wall calcification
2. Galactocele
3. Lipoma


* These lesions can only be safely ignored if they have been confidently diagnosed by an experienced radiologist based on the lesion's appearance and characteristic features and the patient is asymptomatic.




References