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Annals of Surgical Oncology, Vol 5, Issue 8 719-723, Copyright © 1998 by Society of Surgical Oncology

ARTICLES

Accuracy of AJCC staging for breast cancer patients undergoing re-excision for positive margins. American Joint Committee on Cancer

D. R. Brenin and M. Morrow
Department of Surgery, Northwestern University Medical School, Chicago, Illinois, USA.

BACKGROUND: The current AJCC protocol for breast cancer staging does not include additional tumor found at the time of re-excision in the calculation of tumor size. We hypothesize that the AJCC protocol may result in understaging and undertreatment of breast cancer patients who have additional tumor found at re-excision. METHODS: In a retrospective chart review of breast cancer patients, patients with tumor present at re-excision for positive margins were placed in group 1 (n=72); patients with no tumor present at re-excision, or who underwent a single, negative margin procedure were placed in group 2 (n=147). RESULTS: Patients in group 1 had a higher risk of nodal metastases when compared to patients in group 2. Mean tumor size did not differ significantly between the subgroups. Positive re-excision was strongly associated with lymph node metastases on multivariate analysis after correction for age, grade, stage, and lymphatic invasion (odds ratio=3.13, 95% CI=1.58 6.18, P=.0011). CONCLUSIONS: Current AJCC guidelines may result in undertreatment of breast cancer patients with positive re-excisions. The presence of additional tumor at the time of re-excision should be considered when determining the need for systemic therapy, and may be relevant in determining T stage.


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