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. 1999 Apr;229(4):536–541. doi: 10.1097/00000658-199904000-00013

Do all patients with sentinel node metastasis from breast carcinoma need complete axillary node dissection?

K U Chu 1, R R Turner 1, N M Hansen 1, M B Brennan 1, A Bilchik 1, A E Giuliano 1
PMCID: PMC1191740  PMID: 10203087

Abstract

OBJECTIVE: To determine the likelihood of nonsentinel axillary metastasis in the presence of sentinel node metastasis from a primary breast carcinoma. SUMMARY BACKGROUND DATA: Sentinel lymphadenectomy is a highly accurate technique for identifying axillary metastasis from a primary breast carcinoma. Our group has shown that nonsentinel axillary lymph nodes are unlikely to contain tumor cells if the axillary sentinel node is tumor-free, but as yet no study has examined the risk of nonsentinel nodal involvement when the sentinel node contains tumor cells. METHODS: Between 1991 and 1997, axillary lymphadenectomy was performed in 157 women with a tumor-involved sentinel node. Fifty-three axillae (33.5%) had at least one tumor-involved nonsentinel node. The authors analyzed the incidence of nonsentinel node involvement according to clinical and tumor characteristics. RESULTS: Only two variables had a significant impact on the likelihood of nonsentinel node metastasis: the size of the sentinel node metastasis and the size of the primary tumor. The rate of nonsentinel node involvement was 7% when the sentinel node had a micrometastasis (< or =2 mm), compared with 55% when the sentinel node had a macrometastasis (>2 mm). In addition, the rate of nonsentinel node tumor involvement increased with the size of the primary tumor. CONCLUSIONS: If a primary breast tumor is small and if sentinel node involvement is micrometastatic, then tumor cells are unlikely to be found in other axillary lymph nodes. This suggests that axillary lymph node dissection may not be necessary in patients with sentinel node micrometastases from T1/T2 lesions, or in patients with sentinel node metastases from T1a lesions.

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Selected References

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