Entities in boldface are common.
| STATUS OF BREAST | BENIGN CONDITIONS | MALIGNANT CONDITIONS |
|---|---|---|
| Lactating | Acute mastitis | Inflammatory breast cancer |
| Abscess | ||
| Galactocele | ||
| Nonlactating | Duct ectasia | Inflammatory breast cancer |
| Lymphoma | ||
| Nonspecific | Generalized dermatitis (insect bite, sunburn, allergy) | Leukemia |
| Fat necrosis | ||
| Tuberculosis | ||
| Sarcoidosis | ||
| Cat-scratch disease | ||
| Syphilis |