Time to Surgery and the Impact of Delay in the Non-Neoadjuvant Setting on Triple-Negative Breast Cancers and Other Phenotypes.

BACKGROUND: Characterization of breast cancer phenotypes has improved our ability to predict breast cancer behavior. Triple-negative (TN) breast cancers have higher and earlier rates of distant events. It has been suggested that this behavior necessitates treating TNs faster than others, including use of neoadjuvant chemotherapy (NACT) if time to surgery is not rapid. METHODS: A review of women diagnosed with non-inflammatory, invasive breast cancer was conducted using the National Cancer Database for patients not having NACT, diagnosed between 2010 and 2014. Changes in overall survival due to delay were measured by phenotype. RESULTS: Overall, 351,087 patients met the inclusion criteria, including 36,505 (10.4%) TNs, 77.9% hormone receptor-positive (HR+) and 11.7% human epidermal growth factor receptor 2 (HER2)-enriched (HER2+). Phenotype, among other factors, was predictive of treatment delays. Adjusted median days from diagnosis to surgery and chemotherapy were 29.9, 31.6 and 31.5 (p< 0.001), and 72.7, 78.0 and 74.4 (p< 0.001) for TNs, HR+ and HER2+ cancers, respectively. After diagnosis, OS declined for all patients per month of preoperative delay (hazard ratio 1.104; p< 0.001). In models separating or combining surgery and chemotherapy, this survival decline did not vary by breast cancer phenotype (p > 0.3). CONCLUSIONS: Delays cause small but measurable effects overall, but the effect on survival does not differ among breast cancer phenotypes. Our data suggest that urgency between diagnosis and surgery or chemotherapy is similar for breast cancers of different subtypes. Although NACT is sometimes advocated solely to avoid treatment delays, this study does not suggest a greater surgical urgency for TNs compared with other breast cancer phenotypes.

Breast conservation versus mastectomy in patients with T3 breast cancers (> 5 cm): an analysis of 37,268 patients from the National Cancer Database.

PURPOSE: Breast conservation therapy (BCT) is standard for T1-T2 tumors, but early trials excluded breast cancers > 5 cm. This study was performed to assess patterns and outcomes of BCT for T3 tumors. METHODS: We reviewed the National Cancer Database (NCDB) for noninflammatory breast cancers > 5 cm, between 2004 and 2011 who underwent BCT or mastectomy (Mtx) with nodal evaluation. Patients with skin or chest wall involvement were excluded. Patients having clinical T3 tumors were analyzed to determine outcomes based upon presentation, with those having pathologic T3 tumors, subsequently assessed, irrespective of presentation. Overall survival (OS) was analyzed using multivariable Cox proportional hazards models, with adjusted survival curves estimated using inverse probability weighting. RESULTS: After exclusions, 37,268 patients remained. Median age and tumor size for BCT versus Mtx were 53 versus 54 years (p < 0.001) and 6.0 versus 6.7 cm (p < 0.001), respectively. Predictors of BCT included age, race, location, facility type, year of diagnosis, tumor size, grade, histology, nodes examined and positive, and administration of chemotherapy and radiotherapy. OS was similar between Mtx and BCT (p = 0.36). This held true when neoadjuvant chemotherapy patients were excluded (p = 0.39). BCT percentages declined over time (p < 0.001), while tumor sizes remained the same (p = 0.77). Median follow-up was 51.4 months. CONCLUSIONS: OS for patients with T3 breast cancers is similar whether patients received Mtx or BCT, confirming that tumor size should not be an absolute BCT exclusion. Declining use of BCT for tumors > 5 cm in younger patients may be accounted for by recent trends toward mastectomy.

Chemotherapy Significantly Improves Survival for Patients with T1c-T2N0M0 Medullary Breast Cancer: 3739 Cases From the National Cancer Data Base.

BACKGROUND: Medullary breast cancer (MBC) is a rare tumor associated with a better prognosis compared with other breast cancers. The role of adjuvant chemotherapy has not been extensively studied. METHODS: Female patients with invasive MBC reported to the National Cancer Data Base from 2004 to 2012 were analyzed. Overall survival (OS) and treatment were studied using the Kaplan-Meier method and the Cox proportional hazard model. Patients who had node-negative (N0), non-metastatic (M0) tumors 10 to 50 mm in size (T1cN0M0 and T2N0M0) treated with and without chemotherapy were analyzed using propensity score matching. RESULTS: Of 3739 patients with MBC, 2642 (71%) had T1b-T2N0M0 disease treated with and without chemotherapy. Multivariable analysis showed that for all MBC patients, the significant predictors of OS were age older than 65 years, one or more comorbidities, tumor larger than 2 cm, positive nodes, distant metastasis, and treatment with chemotherapy or radiation therapy. Patients with T1cN0M0 and T2N0M0 had improved OS if they received chemotherapy (p < 0.0005). Patients with T1bN0M0 who received chemotherapy did not show better OS than those who did not. Patients with T1c-T2N0M0 were then matched by propensity score based on age, presence of comorbidities, tumor size, and treatment methods used. After matching, the group receiving chemotherapy showed an improved OS (hazard ratio [HR], 0.40; 95% confidence interval [CI], 0.26-0.62; p < 0.0005) compared to the group that did not receive chemotherapy. CONCLUSIONS: For patients with T1c-T2N0M0 MBC, chemotherapy significantly improves OS.

Atypical medullary carcinoma of the breast has similar prognostic factors and survival to typical medullary breast carcinoma: 3,976 cases from the National Cancer Data Base.

BACKGROUNDS AND OBJECTIVES: Medullary breast carcinoma (MBC) is a subtype with a more favorable prognosis. Tumors with some, but not all, characteristics of MBC are classified as atypical medullary carcinoma of the breast (AMCB). METHODS: Patients with invasive MBC and AMCB reported to the National Cancer Data Base (NCDB) from 2004 to 2013 were compared for tumor characteristics and overall survival, using infiltrating ductal carcinoma (IDC) as a reference. RESULTS: Patients with MBC (n = 3,688), AMCB (n = 288), and IDC (n = 918,870) met inclusion criteria. Comparing MBC with AMCB, the mean age at diagnosis (52.9 vs. 53.9 years), mean tumor size (2.4 vs. 2.5 cm), lymph node positivity (22.8% vs. 22.4%), estrogen receptor (ER) positivity (22% vs. 25%), progesterone receptor (PR) positivity (14% vs. 15%), HER2 positivity (11% vs. 14%), rate of breast conserving surgery (67% vs. 68%), use of chemotherapy (76% vs. 75%), and use of hormonal therapy (19% vs. 18%), respectively, were not clinically or statistically different. Five-year (92% vs. 89%) and 10-year survival rates (85% vs. 87%) were not significantly different (P = 0.46). CONCLUSIONS: There does not appear to be any reason to differentiate between AMCB and MBC given the similarities in presentation, treatment and prognosis. J. Surg. Oncol. 2016;114:533-536. © 2016 Wiley Periodicals, Inc.

Patterns of Care and Efficacy of Chemotherapy and Radiotherapy in Skin-Involved Breast Cancers of All Sizes.

BACKGROUND: The management of small skin-involved (SI) invasive breast cancers is controversial because although they are considered unresectable, their prognosis is far better than their stage III classification. This study was undertaken to determine how SI lesions are treated in the United States and to discern the benefit of systemic therapy. PATIENTS AND METHODS: Data of patients diagnosed with stage I-III breast cancer in the National Cancer Data Base between 2004 and 2011 were reviewed. Treatment patterns were examined and overall survival assessed. RESULTS: A total of 3485 patients had SI and 456,287 patients had non-SI breast cancers. Chemotherapy was administered to 68.5% of SI and 45.9% of non-SI tumors (P < .001), including 77.2% of SI and 33% of non-SI tumors < 2 cm (P < .001). After adjusting for patient and tumor characteristics, SI patients were 19.4% more likely to receive chemotherapy than non-SI patients. Radiotherapy was provided to 61.1% of SI and 64.3% of non-SI tumors (P < .001), including 65.5% of SI and 66.5% non-SI tumors < 2 cm (P = .711). After adjusting for patient and tumor characteristics, SI patients were 76.6% more likely to receive radiotherapy than non-SI patients. Chemotherapy and radiotherapy provided an overall survival benefit for stage II and III SI and non-SI tumors. CONCLUSION: Despite controversy regarding staging and prognosis of SI tumors, the majority of patients are provided systemic therapy and radiotherapy. Varied patterns of chemotherapy administration for SI tumors suggests that further treatment guidance and standardization are required, especially because chemotherapy and radiotherapy are equally efficacious in SI and non-SI tumors alike.

Is 6-Month Radiologic Imaging Necessary after Benign Breast Biopsy? Review of Literature and Multicenter Experience.

A retrospective study of 786 patients was conducted to determine the necessity of a 6-month interval study after a benign stereotactic or ultrasound-guided breast biopsy. These results were compared with those of other centers. After reviewing the data, we found few patients developed cancer after their original biopsy, and for those that did, the 6-month study did not contribute to an earlier diagnosis. Those short-term interval radiologic studies that were interpreted as concerning were all benign when biopsied. A 6-month study contributes to higher costs of health care and can be inconvenient, painful, and anxiety producing to patients. Short-interval follow-up was found to be unnecessary.