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Medline ® Abstract for Reference 52

of 'Prognostic and predictive factors in early, nonmetastatic breast cancer'

Adverse prognostic value of peritumoral vascular invasion: is it abrogated by adequate endocrine adjuvant therapy? Results from two International Breast Cancer Study Group randomized trials of chemoendocrine adjuvant therapy for early breast cancer.
Viale G, Giobbie-Hurder A, Gusterson BA, Maiorano E, Mastropasqua MG, Sonzogni A, Mallon E, Colleoni M, Castiglione-Gertsch M, Regan MM, Price KN, Brown RW, Golouh R, Crivellari D, Karlsson P, Ohlschlegel C, Gelber RD, Goldhirsch A, Coates AS
Ann Oncol. 2010 Feb;21(2):245-54. Epub 2009 Jul 24.
BACKGROUND: Peritumoral vascular invasion (PVI) may assist in assigning optimal adjuvant systemic therapy for women with early breast cancer.
PATIENTS AND METHODS: Patients participated in two International Breast Cancer Study Group randomized trials testing chemoendocrine adjuvant therapies in premenopausal (trial VIII) or postmenopausal (trial IX) node-negative breast cancer. PVI was assessed by institutional pathologists and/or central review on hematoxylin-eosin-stained slides in 99% of patients (analysis cohort 2754 patients, median follow-up>9 years).
RESULTS: PVI, present in 23% of the tumors, was associated with higher grade tumors and larger tumor size (trial IX only). Presence of PVI increased locoregional and distant recurrence and was significantly associated with poorer disease-free survival. The adverse prognostic impact of PVI in trial VIII was limited to premenopausal patients with endocrine-responsive tumors randomized to therapies not containing goserelin, and conversely the beneficial effect of goserelin was limited to patients whose tumors showed PVI. In trial IX, all patients received tamoxifen: the adverse prognostic impact of PVI was limited to patients with receptor-negative tumors regardless of chemotherapy.
CONCLUSION: Adequate endocrine adjuvant therapy appears to abrogate the adverse impact of PVI in node-negative disease, while PVI may identify patients who will benefit particularly from adjuvant therapy.
Division of Pathology and Laboratory Medicine, European Institute of Oncology, University of Milan, Milan, Italy. giuseppe.viale@ieo.it