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A retrospective review of phyllodes tumours of the breast: A single institution experience.

Research paper by Vithusha V Ganesh, Leah L Drost, Justin J Lee, Bo Angela BA Wan, Liying L Zhang, Eileen E Rakovitch, Danny D Vesprini, Elzbieta E Slodkowska, K Liang KL Zeng, Philomena P Sousa, Caitlin C Yee, Henry H Lam, Edward E Chow

Indexed on: 13 Dec '17Published on: 13 Dec '17Published in: The Breast



Abstract

Phyllodes tumours are rare and histologically diverse, posing challenges in prognosis and treatment. Due to their rarity, they have seldom been studied.The purpose was to investigate clinical practices in the management of phyllodes tumours, as well as patient outcomes to contribute to the limited body of knowledge surrounding these tumours.A retrospective review was conducted on all patients with phyllodes tumours at a single institution. Descriptive analyses were conducted on demographic, disease and treatment (breast-conserving surgery, mastectomy, surgical re-excision, adjuvant/palliative radiation, palliative chemotherapy) information. Overall and disease-free survivals were analyzed, and the cumulative incidence of recurrence and metastases was compared.79 patients with phyllodes tumours of the breast were included in the study. Tumours were classified as malignant, borderline, or benign in 67.1%, 21.5%, and 11.4% of patients, respectively. There were no statistically significant differences in overall or disease-free survival between patients with benign, borderline or malignant disease. Only patients with malignant disease developed recurrence or metastases. Those with malignant disease who received mastectomies had a lower 10-year cumulative incidence of recurrence; however this was not statistically significant (p = 0.69). All patients had negative surgical margins due to a re-excision or mastectomy following margin-positive breast conserving surgery. Of all risk factors assessed, necrosis was significantly associated with increased incidence of recurrence (local or distant) in patients with malignant disease (p = 0.03).The presence of tumour necrosis is a significant negative prognostic factor. Breast-conserving surgery may be adequate in providing local control, given negative surgical margins.