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Sharp NE , Sachs DB , Melchior NM , Albaneze P , Nardello S , Sigurdson ER , Deng M , Aggon AA , Daly JM , Bleicher RJ
Does the false-negative rate for 1 or 2 negative sentinel nodes after neo-adjuvant chemotherapy translate into a high local recurrence rate?
Breast J. 2021 Mar 11
AbstractProspective trials demonstrate that sentinel node (SN) biopsy after neo-adjuvant chemotherapy (NACT) has a significant false-negative rate (FNR) when only 1 or 2 SNs are removed. It is unknown whether this increased FNR correlates with an elevated risk of recurrence. Tumor Registry data at an NCI-Designated Comprehensive Cancer Center were reviewed from 2004 to 2018 for patients having a negative SN biopsy after NACT. Among 190 patients with histologically negative nodes after NACT having 1 (n = 42), 2 (n = 46), and ≥3 (n = 102) SNs, axillary recurrences occurred in 7.14%, 0%, and 1.96% (p = 0.09), breast recurrences occurred in 2.38%, 6.52%, and 0.98% (p = 0.12), and distance recurrences occurred in 16.67%, 8.70%, and 7.84% (p = 0.27), respectively. Time to first recurrence did not differ by SN count (p = 0.41). After adjustment for age, race, clinical stage, and receptor status, there were no differences in the rates of axillary (p = 0.26), breast (p = 0.44), or distance recurrence (p = 0.24) by numbers of SNs harvested. Median follow-up was 46.8 months. Despite higher post-NACT FNRs reported in randomized trials for patients having <3 sentinel nodes, recurrence rates were not significantly different for 1 versus 2 versus ≥3 SNs. This suggests that patients having 1 or 2 post-NACT SNs identified may not necessitate axillary dissection.
Notes1524-4741 Sharp, Nicole E Orcid: 0000-0001-8931-9672 Sachs, Darren B Melchior, Nicole M Albaneze, Philip Nardello, Salvatore Sigurdson, Elin R Deng, Mengying Aggon, Allison A Daly, John M Bleicher, Richard J P30 CA 006927/United States Public Health Services/ Marlyn Fein Chapter of Fox Chase Cancer Center Board of Associates/ Journal Article United States Breast J. 2021 Mar 11. doi: 10.1111/tbj.14206.