Frequency and outcomes of biopsy-proven fibroadenomas recommended for surgical excision

Published:December 16, 2017DOI:


      • 9% of biopsy-proven fibroadenomas that are >2 cm or display interval growth are re-diagnosed as phyllodes tumors following surgical excision.
      • Less than half (45%) of fibroadenomas that are recommended surgical consultation actually undergo excision.
      • Encouraging patients to follow up with recommendations is crucial so that phyllodes tumors masquerading as fibroadenomas are not missed.


      Our aim was to investigate the outcomes of fibroadenomas recommended for surgical excision due to large size (>2 cm) or interval growth. A retrospective review of our institutional radiology database from 2007 to 2015 was performed. We identified 167 biopsy-proven fibroadenomas recommended for surgical consultation. Of these, 75 (45%) cases actually underwent excision, 7 (9%, 95% CI: 4–18%) of which were upgraded to phyllodes tumors upon histopathological examination. Our results support the current recommendation to surgically excise breast lesions diagnosed as fibroadenomas with size >2 cm or with interval growth due to the considerable risk of finding phyllodes tumors.


      FNA (fine needle aspiration), CNB (core needle biopsy)


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