Sections View Full Chapter Figures Tables Videos Annotate Full Chapter Figures Tables Videos Supplementary Content + Download Section PDF Listen ++ For further information, see CMDT Part 17-02: Fibroadenoma of the Breast + Key Features Download Section PDF Listen +++ ++ Common benign neoplasm Most frequent in young women Occurs somewhat more frequently and at an earlier age in black women Multiple fibroadenomas in 10–15% of affected patients + Clinical Findings Download Section PDF Listen +++ ++ Round or ovoid, rubbery, discrete, relatively mobile, nontender mass, 1–5 cm in diameter Usually discovered accidentally Rarely occurs after menopause unless patient is receiving hormone replacement therapy + Diagnosis Download Section PDF Listen +++ ++ Breast ultrasonography useful in differentiating cystic from solid mass Needle biopsy or fine-needle aspiration generally adequate for diagnosis Excision with pathologic examination if diagnosis remains uncertain Presumed fibroadenomas > 3 cm or 4 cm should be excised to rule out phyllodes tumors Differential diagnosis Fibrocystic disease or cyst Breast cancer Lipoma Phyllodes tumor Breast abscess Intraductal papilloma Fat necrosis + Treatment Download Section PDF Listen +++ ++ No treatment is necessary if the diagnosis can be made by core needle biopsy Excision with pathologic examination is performed if the diagnosis is uncertain Cryoablation Appears to be safe if the lesion is a biopsy-proven fibroadenoma prior to ablation Not appropriate for all fibroadenomas because some are too large to freeze or the diagnosis may not be certain