Axillary node staging for microinvasive breast cancer: is it justified?

Annals of Surgical Oncology
John M LyonsHiram S Cody

Abstract

The natural history and role of axillary staging in microinvasive breast cancer (DCISM) remains controversial. We report clinical characteristics and outcome in patients with DCISM, focusing on the role of sentinel lymph node (SLN) biopsy. From our prospective database we retrospectively identified 112 patients with DCISM who underwent SLN biopsy between 1996 and 2004 at our institution. Median follow-up was 6 years. We found positive SLN in 12% of patients (14 of 112): macrometastasis in 2.7% (3 of 112) and micrometastases or isolated tumor cells (ITC) in 10% (11 of 112). We performed axillary dissection (ALND) in all patients with macrometastasis (3 of 3), finding additional positive nodes in 66% (2 of 3), and in 27% of those with micrometastases/ITCs (3 of 11), finding no additional positive nodes. Among 98 patients with negative SLN (38% of whom received systemic therapy), there were 5 locoregional recurrences (1 in the ipsilateral axilla, 4 in the ipsilateral breast, all DCIS) and 4 contralateral second primary cancers. Among 14 patients with positive SLN (82 % of whom received systemic adjuvant therapy), there were no locoregional or distant recurrences. Our results suggest that SLN biopsy may be justified for DCISM, but ...Continue Reading

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