Abstract
Resection margin status is one of the most significant factors for local recurrence in patients with ductal carcinoma in situ (DCIS) treated with breast-conserving surgery with or without radiation. However, its impact on chest wall recurrence in patients treated with mastectomy is unknown. The purpose of this study was to determine chest wall recurrence rates in women with DCIS and close (<5 mm) or positive mastectomy margins in order to evaluate the potential role of radiation therapy. Between 1985 and 2005, 193 women underwent mastectomy for DCIS. Fifty-five patients had a close final margin, and 4 patients had a positive final margin. Axillary surgery was performed in 17 patients. Median follow-up was 8 years. Formal pathology review was conducted to measure and verify margin status. Nuclear grade, architectural pattern, and presence or absence of necrosis was recorded. Median pathologic size of the DCIS in the mastectomy specimen was 4.5 cm. Twenty-two patients had DCIS of >5 cm or diffuse disease. Median width of the close final margin was 2 mm. Nineteen patients had margins of <1 mm. One of these 59 patients experienced a chest wall recurrence with regional adenopathy, followed by distant metastases 2 years following ski...Continue Reading
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