Does the Time from Diagnostic Biopsy to Neoadjuvant Chemotherapy Affect the Rate of Pathologic Complete Response in Stages I–III Breast Cancer?
| Autor: | M Eslami, O Hajjaj, C. Simmons, H Li, D Le, Stephen Chia |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Adult
medicine.medical_specialty time to treatment Biopsy medicine.medical_treatment Breast Neoplasms Logistic regression Gastroenterology Cohort Studies pathologic complete response Breast cancer Internal medicine Humans Medicine Prospective Studies Stage (cooking) Complete response Aged Neoplasm Staging Aged 80 and over Chemotherapy medicine.diagnostic_test business.industry Cancer Middle Aged medicine.disease Chemotherapy Adjuvant Original Article Female business Adjuvant neoadjuvant chemotherapy |
| Zdroj: | Curr Oncol Current Oncology Volume 27 Issue 3 Pages 5907-270 |
| ISSN: | 1718-7729 |
| Popis: | Studies in the adjuvant setting suggest that the timing of breast cancer diagnosis, surgery, and chemotherapy might affect outcomes. In the neoadjuvant setting, data exploring whether expeditious neoadjuvant chemotherapy (nac) after diagnosis improves the rate of pathologic complete response (pcr) in breast cancer are limited. Patients who received nac and completed treatment between May 2012 and December 2018 were identified from a prospectively collected database at BC Cancer. Time from diagnosis to start of nac was calculated. Patients were grouped into those who did and did not experience a pcr, and those who started nac within 28 days or after 28 days [time to nac (ttn)]. The association between pcr and ttn was tested using logistic regression. In the time period studied, 482 patients who received nac were identified. After exclusions, 421 patients met the eligibility criteria. Median time from biopsy to chemotherapy was 33 days (range: 7&ndash 140 days). In 149 patients (35.4%), nac was received within 28 days of diagnosis (range: 7&ndash 28 days) in 272 patients (64.6%), it was received after more than 28 days (range: 29&ndash 140 days). The overall pcr rate was 31.8%. A trend toward a higher pcr rate, although not statistically significant, was observed in the group that initiated chemotherapy within 28 days (34.2% vs. 30.5%, p = 0.43). In the logistic regression model, rates of pcr were associated with receptor status, but not age, stage, or ttn. In the neoadjuvant setting, we observed no difference in the rate of pcr in patients who started nac within 28 days or after 28 days. |
| Databáze: | OpenAIRE |
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