GAMUT I-10-2
BREAST CALCIFICATIONS - SEMICIRCULAR, CIRCULAR, OR EGGSHELL


COMMON
1. Calcified sebaceous gland cysts ; other skin lesions
2. Fibroadenoma  
3. Fibrocystic change 
4. Oil or lipid cyst (posttraumatic or postsurgical fat necrosis)


UNCOMMON
1. Galactocele (in capsule)
2. Lipoma with fat necrosis
3. Liponecrosis microcystica calcificans (subcutaneous fat necrosis)
4. Panniculitis nodularis, nonsuppurative (Weber-Christian disease)
5. Papilloma
6. Plasma cell mastitis* (periductal mastitis; also known as secretory disease)
7. Postradiation therapy (dystrophic round or ring-like calcifications)
8. Silicone or paraffin globules  


* May occasionally show dense, regular, elongated, linear or branching intraductal calcifications as well as more common large, smooth, dense, round, or oval calcifications.




References