Confined to where they originally developed from; doesn’t invade surrounding tissue but can still increase in size
Benign
Benign overgrowth of the fibrous tissue and glandular tissue of the lobule. Because it contains epithelial tissue, it can respond to cyclical hormonal changes
Fibroadenoma
After menopause, it will atrophy along with the rest of the breast tissue
Fibroadenoma
An uncommon variant that is seen more commonly in African-American population
Juvenile fibroadenoma
Generally, excision is indicated
Juvenile fibroadenoma
Benign proliferation of breast stroma with channels aligned by thin spindle cells
Pseudoangiomatous Stromal Hyperplasia (PASH)
Generally managed conservatively with serial imaging
Pseudoangiomatous Stromal Hyperplasia (PASH)
Similar to fibroadenoma but it’s UTS appearance shows Swiss cheese appearance (heterogenous)
Juvenile papillomatosis
Similar to fibroadenoma but has higher risk for breast cancer
Juvenile papillomatosis
Benign neoplasm
- Fibroadenoma
- Juvenile fibroadenoma
- Pseudoangiomatous Stromal Hyperplasia (PASH)
- Juvenile papillomatosis
Most common breast malignancy (adolescent)
Phyllodes tumor
Degree of malignancy can be predicted by sacromatous elements, infiltration margins, and Stromal cell atypia
Phyllodes tumor
More common than primary breast cancer
Metastases
Most common primary tumors that metastasized to the breast
- Lymphoma
- Leukemia
- Rhabdomyosarcoma
Breast cancer that has not spread beyond the breast or the lumph nodes under the arm
Primary breast carcinoma
