What are the rates of recurrence of phyllodes tumors (cystosarcoma phyllodes)?

Updated: Jul 20, 2021
  • Author: Donald R Lannin, MD; Chief Editor: John Geibel, MD, MSc, DSc, AGAF  more...
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A study from the British Columbia Cancer Agency analyzed local recurrence, overall survival, and disease-free survival (DFS) in 183 patients with newly diagnosed benign (n = 83), borderline (n = 50), or malignant (n = 49) phyllodes tumors who were followed for a median of 65 months (range, 0.5-197 months). [11]  Overall, 8.7% experienced local recurrence, 4.4% distant metastasis, and 3.8% cause-specific death. With respect to individual subgroups, 5-year outcomes for women with benign, borderline, and malignant phyllodes tumors were as follows:

  • Local recurrence - 6%, 9%, and 21%, resectively
  • Overall survival - 96%, 100%, and 82%, respectively
  • DFS - 94%, 91%, and 67%, respectively

The 5-year local recurrence rates were 8% for women with negative margins, 6% for those with close margins, and 37% for those with positive margins. [11] The corresponding rates for intermediate, pushing, and infiltrative borders were 6%, 6%, and 33%, respectively. Positive margins and infiltrative tumor borders were significantly associated with increased local recurrence.

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