GAMUT I-1-2
CIRCUMSCRIBED BREAST LESIONS EVALUATED BY SIZE - LARGE (over 4 cm)


COMMON
1. Carcinoma  (unusual to be circumscribed at this size)
2. Cyst  (simple or complicated)


UNCOMMON
1. Abscess
2. Axillary or unusual intramammary lymphadenopathy (eg, lymphoma G, metastasis) (See I-17)
*3. Fibroadenolipoma (hamartoma)  
4. Hematoma
*5. Lipoma 
6. Metastasis to breast
*7. Oil or lipid cyst, large (posttraumatic or postsurgical fat necrosis)
8. Phyllodes tumor (formerly cystosarcoma phyllodes; giant fibroadenoma)
9. Postoperative seroma  (eg, after implant removal-usually not well circumscribed)
10. Sarcoma
11. [Sebaceous cyst]


*Radiolucent or partially lucent lesions containing fat.

[    ] This condition does not actually cause the gamuted imaging finding, but can produce imaging changes that simulate it.




References