PMID- 34201809 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210726 IS - 2075-4418 (Print) IS - 2075-4418 (Electronic) IS - 2075-4418 (Linking) VI - 11 IP - 7 DP - 2021 Jun 23 TI - Evaluation of Complete Pathological Regression after Neoadjuvant Chemotherapy in Triple-Negative Breast Cancer Patients with BRCA1 Founder Mutation Aided Bayesian A/B Testing Approach. LID - 10.3390/diagnostics11071144 [doi] LID - 1144 AB - The aim of this study was to evaluate the probability of pathologic complete regression (pCR) by the BRCA1 gene mutation status in patients with triple-negative breast cancer (TNBC) treated with neoadjuvant chemotherapy. The study involved 143 women (mean age 55.4 +/- 13.1 years) with TNBC. The BRCA1 mutation was observed in 17% of the subjects. The most commonly used (85.3%) chemotherapy regimen was four cycles of adriamycine and cyclophosphamide followed by 12 cycles of paclitaxel (4AC + 12T). The differences between clinico-pathological factors by BRCA1 status were estimated. Odds ratios and 95% confidence intervals for pCR vs. non-pCR were calculated using logistic regression. The probability distribution of pCR based on BRCA1 status was estimated using beta distributions. The presence of T3-T4 tumours, cancer in stages II and III, lymphovascular invasion, and the use of chemotherapy schedules other than 4AC + 12T significantly decreased the odds of pCR. It was established that there was a 20% chance that pCR in patients with the BRCA1 mutation was 50% or more times as frequent than in patients without the mutation. Thus, the BRCA1 mutation can be a predictive factor for pCR in patients with TNBC. FAU - Kedzierawski, Piotr AU - Kedzierawski P AUID- ORCID: 0000-0002-1835-8794 AD - Department of Oncology, Institute of Health Sciences, Collegium Medicum, Jan Kochanowski University, 25-713 Kielce, Poland. AD - Radiotherapy Clinic, Holycross Cancer Centre, 25-734 Kielce, Poland. FAU - Macek, Pawel AU - Macek P AUID- ORCID: 0000-0001-9755-7507 AD - Department of Oncology, Institute of Health Sciences, Collegium Medicum, Jan Kochanowski University, 25-713 Kielce, Poland. AD - Department of Epidemiology and Cancer Control, Holycross Cancer Centre, 25-734 Kielce, Poland. FAU - Ciepiela, Izabela AU - Ciepiela I AD - Radiotherapy Clinic, Holycross Cancer Centre, 25-734 Kielce, Poland. FAU - Kowalik, Artur AU - Kowalik A AUID- ORCID: 0000-0002-3718-999X AD - Division of Medical Biology, Institute of Biology, Jan Kochanowski University, 25-406 Kielce, Poland. AD - Department of Molecular Diagnostics, Holycross Cancer Centre, 25-734 Kielce, Poland. FAU - Gozdz, Stanislaw AU - Gozdz S AD - Department of Oncology, Institute of Health Sciences, Collegium Medicum, Jan Kochanowski University, 25-713 Kielce, Poland. AD - Clinical Oncology Clinic, Holycross Cancer Centre, 25-734 Kielce, Poland. LA - eng PT - Journal Article DEP - 20210623 PL - Switzerland TA - Diagnostics (Basel) JT - Diagnostics (Basel, Switzerland) JID - 101658402 PMC - PMC8306462 OTO - NOTNLM OT - BRCA1 OT - Bayesian statistics OT - breast cancer OT - pathologic complete regression OT - triple-negative breast cancer COIS- The authors report no conflicts of interest. EDAT- 2021/07/03 06:00 MHDA- 2021/07/03 06:01 PMCR- 2021/06/23 CRDT- 2021/07/02 01:12 PHST- 2021/04/20 00:00 [received] PHST- 2021/06/18 00:00 [revised] PHST- 2021/06/21 00:00 [accepted] PHST- 2021/07/02 01:12 [entrez] PHST- 2021/07/03 06:00 [pubmed] PHST- 2021/07/03 06:01 [medline] PHST- 2021/06/23 00:00 [pmc-release] AID - diagnostics11071144 [pii] AID - diagnostics-11-01144 [pii] AID - 10.3390/diagnostics11071144 [doi] PST - epublish SO - Diagnostics (Basel). 2021 Jun 23;11(7):1144. doi: 10.3390/diagnostics11071144.