(P012) Breast Cancer Patients With Collagen Vascular Disease May Be Undertreated With Radiation Despite Low Rates of Toxicity

National guidelines include collagen vascular disease (CVD) as a relative contraindication to breast conserving therapy (BCT) out of concern for greater radiation toxicity. We studied the use of radiation in patients with breast cancer and CVD and the incidence of acute and late toxicity. We hypothesized that patients with CVD may be undertreated with postlumpectomy radiation compared to our institutional rate of approximately 95%.

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