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Background:Whether sentinel lymph node biopsy should be performed in patients ≥70 years old with early-stage invasive breast cancer is controversial. We examined the effect of sentinel lymph node biopsy on the treatment and outcomes in this population. Materials and Methods:In this retrospective study, patients aged ≥70 years who were treated for invasive breast cancer with sentinel lymph node biopsy followed by mastectomy or lumpectomy between 2010 and 2019 were identified from our database. Patients were compared according to sentinel lymph node status. Outcomes were analyzed using the Kaplan–Meier method and Cox multivariate analysis. Results:Of the 376 patients enrolled in this study, 311 (82.7%) were sentinel lymph node-negative and 65 (17.3%) were sentinel lymph node-positive. The median follow-up duration for all patients was 70 months. Systemic treatment and radiation were similar between sentinel lymph node-negative and -positive groups. Disease-free survival, distant disease-free survival, breast cancer-specific survival, overall survival were not significantly different between groups (88.2% vs 87.6%, 96.7% vs 94.8%, 96.2% vs 93.6%, and 93.5% vs 90.0%, respectively). Sentinel lymph node status, tumor size, chemotherapy, endocrine therapy, and adjuvant radiation were included in Cox multivariate analysis. None of the variables were found to significantly affect disease-free survival, distant disease-free survival, breast cancer-specific survival, and overall survival. Conclusions:Our analysis indicated that sentinel lymph node status may not affect systemic treatment decisions or survival in patients aged ≥70 years with breast cancer.

Background The association between the type of anesthesia used and the recurrence of cancer remains controversial. This study aimed to compare the effects of local vs general anesthesia on recurrence-free survival and cost after breast-conserving surgery.Materials and Methods We reviewed the data of 2778 patients who underwent breast-conserving surgery followed by radiation at our center between 1999 and 2014. We analyzed the data of 994 patients with hormone receptor-positive and Her2-negative tumors who underwent breast-conserving surgery without axillary lymph node dissection under local or general anesthesia. Patients were grouped according to whether local or general anesthesia was used for the surgery.Results Of the 994 patients enrolled in this study, 367 received local anesthesia and 627 patients received general anesthesia. The median follow-up duration for all patients was 93 months. The Kaplan–Meier survival curves did not reveal significant differences between the recurrence-free survival of the two groups, with 5-year recurrence-free survival rates of 96.3% (95% CI, 94.3–98.3%) in the local anesthesia group and 97.3% (95% CI, 95.9–98.7%) in the general anesthesia group. The total cost of hospitalization in the local anesthesia group was significantly lower than that in the general anesthesia group (P<.001). The difference in the cost between the two groups remained significant, irrespective of the type of hospitalization, after excluding 165 patients receiving chemotherapy during their hospitalization.Conclusions Our analysis indicated no association between the type of anesthesia used during breast-conserving surgery and the long-term prognosis of breast cancer. However,breast-conserving surgery under local anesthesia may be a less expensive option than that under general anesthesia.